20353155156 has 18 divisors (see below), whose sum is σ = 51448253402. Its totient is φ = 6784385040.

The previous prime is 20353155149. The next prime is 20353155169. The reversal of 20353155156 is 65155135302.

20353155156 is a `hidden beast` number, since 2 + 0 + 3 + 53 + 1 + 551 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20154345156 + 198810000 = 141966^2 + 14100^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 565365421 = 20353155156 / (2 + 0 + 3 + 5 + 3 + 1 + 5 + 5 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 20353155156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282682675 + ... + 282682746.

Almost surely, 2^20353155156 is an apocalyptic number.

It is an amenable number.

20353155156 is an abundant number, since it is smaller than the sum of its proper divisors (31095098246).

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

20353155156 is a wasteful number, since it uses less digits than its factorization.

20353155156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565365431 (or 565365426 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

It can be divided in two parts, 20 and 353155156, that added together give a triangular number (353155176 = T₂₆₅₇₆).

The spelling of 20353155156 in words is "twenty billion, three hundred fifty-three million, one hundred fifty-five thousand, one hundred fifty-six".