20402000024 has 32 divisors (see below), whose sum is σ = 43726368000. Its totient is φ = 8742155040.

The previous prime is 20401999997. The next prime is 20402000053. The reversal of 20402000024 is 42000020402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20401999972 and 20402000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317759 + ... + 376529.

It is an arithmetic number, because the mean of its divisors is an integer number (1366449000).

Almost surely, 2^20402000024 is an apocalyptic number.

It is an amenable number.

20402000024 is an abundant number, since it is smaller than the sum of its proper divisors (23324367976).

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

20402000024 is a wasteful number, since it uses less digits than its factorization.

20402000024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64983 (or 64979 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20402000024 its reverse (42000020402), we get a palindrome (62402020426).

The spelling of 20402000024 in words is "twenty billion, four hundred two million, twenty-four", and thus it is an aban number.