20531836755 has 24 divisors (see below), whose sum is σ = 35988395040. Its totient is φ = 10827273600.

The previous prime is 20531836739. The next prime is 20531836771. The reversal of 20531836755 is 55763813502.

20531836755 is a `hidden beast` number, since 2 + 0 + 531 + 8 + 3 + 67 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (20531836739) and next prime (20531836771).

It is not a de Polignac number, because 20531836755 - 2⁴ = 20531836739 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 20531836755.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2559271 + ... + 2567280.

It is an arithmetic number, because the mean of its divisors is an integer number (1499516460).

Almost surely, 2^20531836755 is an apocalyptic number.

20531836755 is a deficient number, since it is larger than the sum of its proper divisors (15456558285).

20531836755 is a wasteful number, since it uses less digits than its factorization.

20531836755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126651 (or 5126648 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 20531836755 in words is "twenty billion, five hundred thirty-one million, eight hundred thirty-six thousand, seven hundred fifty-five".