20531256822153 has 64 divisors (see below), whose sum is σ = 37929910487040. Its totient is φ = 10663388596800.

The previous prime is 20531256822149. The next prime is 20531256822173. The reversal of 20531256822153 is 35122865213502.

20531256822153 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 12 + 568 + 2 + 21 + 53 = 666.

It is not a de Polignac number, because 20531256822153 - 2² = 20531256822149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20531256822099 and 20531256822108.

It is not an unprimeable number, because it can be changed into a prime (20531256822173) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9090226 + ... + 11121812.

It is an arithmetic number, because the mean of its divisors is an integer number (592654851360).

Almost surely, 2^{20531256822153} is an apocalyptic number.

It is an amenable number.

20531256822153 is a deficient number, since it is larger than the sum of its proper divisors (17398653664887).

20531256822153 is a wasteful number, since it uses less digits than its factorization.

20531256822153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036475 (or 2036469 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 20531256822153 in words is "twenty trillion, five hundred thirty-one billion, two hundred fifty-six million, eight hundred twenty-two thousand, one hundred fifty-three".