20355793155 has 64 divisors (see below), whose sum is σ = 37862277120. Its totient is φ = 10356686208.

The previous prime is 20355793141. The next prime is 20355793189. The reversal of 20355793155 is 55139755302.

20355793155 is a `hidden beast` number, since 2 + 0 + 3 + 557 + 93 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 20355793155 - 2⁵ = 20355793123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20355793155.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1180657 + ... + 1197773.

It is an arithmetic number, because the mean of its divisors is an integer number (591598080).

Almost surely, 2^20355793155 is an apocalyptic number.

20355793155 is a deficient number, since it is larger than the sum of its proper divisors (17506483965).

20355793155 is a wasteful number, since it uses less digits than its factorization.

20355793155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17537 (or 17531 counting only the distinct ones).

The product of its (nonzero) digits is 708750, while the sum is 45.

The spelling of 20355793155 in words is "twenty billion, three hundred fifty-five million, seven hundred ninety-three thousand, one hundred fifty-five".