20553523158 has 32 divisors (see below), whose sum is σ = 49742982144. Its totient is φ = 5526997632.

The previous prime is 20553523157. The next prime is 20553523213. The reversal of 20553523158 is 85132535502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553523153) 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, 14392510 + ... + 14393937.

It is an arithmetic number, because the mean of its divisors is an integer number (1554468192).

Almost surely, 2^20553523158 is an apocalyptic number.

20553523158 is an abundant number, since it is smaller than the sum of its proper divisors (29189458986).

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

20553523158 is a wasteful number, since it uses less digits than its factorization.

20553523158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28786476.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 20553523158 in words is "twenty billion, five hundred fifty-three million, five hundred twenty-three thousand, one hundred fifty-eight".