20122401440 has 48 divisors (see below), whose sum is σ = 50041242720. Its totient is φ = 7625329920.

The previous prime is 20122401433. The next prime is 20122401449. The reversal of 20122401440 is 4410422102.

It is a super-2 number, since 2×20122401440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20122401449) 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, 3306566 + ... + 3312645.

It is an arithmetic number, because the mean of its divisors is an integer number (1042525890).

Almost surely, 2^20122401440 is an apocalyptic number.

20122401440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122401440 is an abundant number, since it is smaller than the sum of its proper divisors (29918841280).

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

20122401440 is a wasteful number, since it uses less digits than its factorization.

20122401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619245 (or 6619237 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20122401440 its reverse (4410422102), we get a palindrome (24532823542).

The spelling of 20122401440 in words is "twenty billion, one hundred twenty-two million, four hundred one thousand, four hundred forty".