20155545315 has 48 divisors (see below), whose sum is σ = 35482636800. Its totient is φ = 10582318656.

The previous prime is 20155545299. The next prime is 20155545323. The reversal of 20155545315 is 51354555102.

20155545315 is a `hidden beast` number, since 20 + 1 + 55 + 54 + 531 + 5 = 666.

It is not a de Polignac number, because 20155545315 - 2⁴ = 20155545299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20155545315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1225416 + ... + 1241754.

It is an arithmetic number, because the mean of its divisors is an integer number (739221600).

Almost surely, 2^20155545315 is an apocalyptic number.

20155545315 is a deficient number, since it is larger than the sum of its proper divisors (15327091485).

20155545315 is a wasteful number, since it uses less digits than its factorization.

20155545315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16776 (or 16773 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 20155545315 in words is "twenty billion, one hundred fifty-five million, five hundred forty-five thousand, three hundred fifteen".