20135131900572 has 48 divisors (see below), whose sum is σ = 50596741383552. Its totient is φ = 6195331047360.

The previous prime is 20135131900519. The next prime is 20135131900573. The reversal of 20135131900572 is 27500913153102.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20135131900572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135131900573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9688003 + ... + 11581349.

It is an arithmetic number, because the mean of its divisors is an integer number (1054098778824).

Almost surely, 2^{20135131900572} is an apocalyptic number.

It is an amenable number.

20135131900572 is an abundant number, since it is smaller than the sum of its proper divisors (30461609482980).

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

20135131900572 is a wasteful number, since it uses less digits than its factorization.

20135131900572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961538 (or 1961536 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The spelling of 20135131900572 in words is "twenty trillion, one hundred thirty-five billion, one hundred thirty-one million, nine hundred thousand, five hundred seventy-two".