20502720504 has 48 divisors (see below), whose sum is σ = 63460803120. Its totient is φ = 5857920000.

The previous prime is 20502720463. The next prime is 20502720551. The reversal of 20502720504 is 40502720502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20339497 + ... + 20340504.

It is an arithmetic number, because the mean of its divisors is an integer number (1322100065).

Almost surely, 2^20502720504 is an apocalyptic number.

20502720504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20502720504 is an abundant number, since it is smaller than the sum of its proper divisors (42958082616).

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

20502720504 is a wasteful number, since it uses less digits than its factorization.

20502720504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40680020 (or 40680013 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The spelling of 20502720504 in words is "twenty billion, five hundred two million, seven hundred twenty thousand, five hundred four".