20556132519 has 64 divisors (see below), whose sum is σ = 31138451456. Its totient is φ = 11975040000.

The previous prime is 20556132481. The next prime is 20556132523. The reversal of 20556132519 is 91523165502.

It is not a de Polignac number, because 20556132519 - 2⁹ = 20556132007 is a prime.

It is a super-2 number, since 2×20556132519² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20556132019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15560379 + ... + 15561699.

It is an arithmetic number, because the mean of its divisors is an integer number (486538304).

Almost surely, 2^20556132519 is an apocalyptic number.

20556132519 is a deficient number, since it is larger than the sum of its proper divisors (10582318937).

20556132519 is a wasteful number, since it uses less digits than its factorization.

20556132519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 20556132519 in words is "twenty billion, five hundred fifty-six million, one hundred thirty-two thousand, five hundred nineteen".