20877687255 has 16 divisors (see below), whose sum is σ = 35162421120. Its totient is φ = 10548726048.

The previous prime is 20877687133. The next prime is 20877687263. The reversal of 20877687255 is 55278677802.

It is not a de Polignac number, because 20877687255 - 2¹¹ = 20877685207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 20877687195 and 20877687204.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 36627237 + ... + 36627806.

It is an arithmetic number, because the mean of its divisors is an integer number (2197651320).

Almost surely, 2^20877687255 is an apocalyptic number.

20877687255 is a deficient number, since it is larger than the sum of its proper divisors (14284733865).

20877687255 is a wasteful number, since it uses less digits than its factorization.

20877687255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73255070.

The product of its (nonzero) digits is 13171200, while the sum is 57.

The spelling of 20877687255 in words is "twenty billion, eight hundred seventy-seven million, six hundred eighty-seven thousand, two hundred fifty-five".