20112321040 has 40 divisors (see below), whose sum is σ = 53441311680. Its totient is φ = 6895652736.

The previous prime is 20112320999. The next prime is 20112321049. The reversal of 20112321040 is 4012321102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20112321049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17956870 + ... + 17957989.

It is an arithmetic number, because the mean of its divisors is an integer number (1336032792).

Almost surely, 2^20112321040 is an apocalyptic number.

20112321040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112321040 is an abundant number, since it is smaller than the sum of its proper divisors (33328990640).

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

20112321040 is a wasteful number, since it uses less digits than its factorization.

20112321040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35914879 (or 35914873 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20112321040 its reverse (4012321102), we get a palindrome (24124642142).

The spelling of 20112321040 in words is "twenty billion, one hundred twelve million, three hundred twenty-one thousand, forty".