20620400024 has 16 divisors (see below), whose sum is σ = 44186571600. Its totient is φ = 8837314272.

The previous prime is 20620399997. The next prime is 20620400029. The reversal of 20620400024 is 42000402602.

It is a junction number, because it is equal to n+sod(n) for n = 20620399969 and 20620400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620400029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184110659 + ... + 184110770.

It is an arithmetic number, because the mean of its divisors is an integer number (2761660725).

Almost surely, 2^20620400024 is an apocalyptic number.

It is an amenable number.

20620400024 is an abundant number, since it is smaller than the sum of its proper divisors (23566171576).

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

20620400024 is a wasteful number, since it uses less digits than its factorization.

20620400024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368221442 (or 368221438 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20620400024 its reverse (42000402602), we get a palindrome (62620802626).

The spelling of 20620400024 in words is "twenty billion, six hundred twenty million, four hundred thousand, twenty-four".