20415513255 has 16 divisors (see below), whose sum is σ = 32718649344. Its totient is φ = 10870331040.

The previous prime is 20415513247. The next prime is 20415513269. The reversal of 20415513255 is 55231551402.

It is not a de Polignac number, because 20415513255 - 2³ = 20415513247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1112011 + ... + 1130220.

It is an arithmetic number, because the mean of its divisors is an integer number (2044915584).

Almost surely, 2^20415513255 is an apocalyptic number.

20415513255 is a deficient number, since it is larger than the sum of its proper divisors (12303136089).

20415513255 is a wasteful number, since it uses less digits than its factorization.

20415513255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242846.

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 20415513255 in words is "twenty billion, four hundred fifteen million, five hundred thirteen thousand, two hundred fifty-five".