20125533026172 has 48 divisors (see below), whose sum is σ = 53745755501312. Its totient is φ = 5741830782720.

The previous prime is 20125533026161. The next prime is 20125533026189. The reversal of 20125533026172 is 27162033552102.

It is a self number, because there is not a number n which added to its sum of digits gives 20125533026172.

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, 173306413 + ... + 173422500.

Almost surely, 2^{20125533026172} is an apocalyptic number.

It is an amenable number.

20125533026172 is an abundant number, since it is smaller than the sum of its proper divisors (33620222475140).

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

20125533026172 is a wasteful number, since it uses less digits than its factorization.

20125533026172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346729618 (or 346729616 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

Adding to 20125533026172 its reverse (27162033552102), we get a palindrome (47287566578274).

It can be divided in two parts, 2012553 and 3026172, that added together give a triangular number (5038725 = T₃₁₇₄).

The spelling of 20125533026172 in words is "twenty trillion, one hundred twenty-five billion, five hundred thirty-three million, twenty-six thousand, one hundred seventy-two".