20664535255 has 32 divisors (see below), whose sum is σ = 31264345728. Its totient is φ = 12760934400.

The previous prime is 20664535231. The next prime is 20664535273. The reversal of 20664535255 is 55253546602.

It is not a de Polignac number, because 20664535255 - 2³¹ = 18517051607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 535206 + ... + 572515.

It is an arithmetic number, because the mean of its divisors is an integer number (977010804).

Almost surely, 2^20664535255 is an apocalyptic number.

20664535255 is a deficient number, since it is larger than the sum of its proper divisors (10599810473).

20664535255 is a wasteful number, since it uses less digits than its factorization.

20664535255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107787.

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 20664535255 in words is "twenty billion, six hundred sixty-four million, five hundred thirty-five thousand, two hundred fifty-five".