20165620526556 has 48 divisors (see below), whose sum is σ = 48325849979904. Its totient is φ = 6540061905216.

The previous prime is 20165620526549. The next prime is 20165620526587. The reversal of 20165620526556 is 65562502656102.

It is a super-2 number, since 2×20165620526556² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20165620526499 and 20165620526508.

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, 21502461 + ... + 22420683.

It is an arithmetic number, because the mean of its divisors is an integer number (1006788541248).

Almost surely, 2^{20165620526556} is an apocalyptic number.

It is an amenable number.

20165620526556 is an abundant number, since it is smaller than the sum of its proper divisors (28160229453348).

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

20165620526556 is a wasteful number, since it uses less digits than its factorization.

20165620526556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967730 (or 967728 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 51.

The spelling of 20165620526556 in words is "twenty trillion, one hundred sixty-five billion, six hundred twenty million, five hundred twenty-six thousand, five hundred fifty-six".