20523651765204 has 48 divisors (see below), whose sum is σ = 54731597953536. Its totient is φ = 5863701228000.

The previous prime is 20523651765193. The next prime is 20523651765217. The reversal of 20523651765204 is 40256715632502.

It is a super-2 number, since 2×20523651765204² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656222 + ... + 6617429.

It is an arithmetic number, because the mean of its divisors is an integer number (1140241624032).

Almost surely, 2^{20523651765204} is an apocalyptic number.

It is an amenable number.

20523651765204 is an abundant number, since it is smaller than the sum of its proper divisors (34207946188332).

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

20523651765204 is a wasteful number, since it uses less digits than its factorization.

20523651765204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8303196 (or 8303194 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 20523651765204 in words is "twenty trillion, five hundred twenty-three billion, six hundred fifty-one million, seven hundred sixty-five thousand, two hundred four".