20030331100 has 144 divisors (see below), whose sum is σ = 48625012800. Its totient is φ = 7113553920.

The previous prime is 20030331091. The next prime is 20030331109. The reversal of 20030331100 is 113303002.

It is an interprime number because it is at equal distance from previous prime (20030331091) and next prime (20030331109).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030331109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4278561 + ... + 4283239.

It is an arithmetic number, because the mean of its divisors is an integer number (337673700).

Almost surely, 2^20030331100 is an apocalyptic number.

20030331100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20030331100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24312506400).

20030331100 is an abundant number, since it is smaller than the sum of its proper divisors (28594681700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20030331100 is a wasteful number, since it uses less digits than its factorization.

20030331100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832 (or 4825 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 20030331100 its reverse (113303002), we get a palindrome (20143634102).

The spelling of 20030331100 in words is "twenty billion, thirty million, three hundred thirty-one thousand, one hundred".