20557088523 has 36 divisors (see below), whose sum is σ = 31262318760. Its totient is φ = 13350597120.

The previous prime is 20557088443. The next prime is 20557088543. The reversal of 20557088523 is 32588075502.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

20557088523 is a `hidden beast` number, since 2 + 0 + 55 + 70 + 8 + 8 + 523 = 666.

It is not a de Polignac number, because 20557088523 - 2¹⁶ = 20557022987 is a prime.

It is a super-3 number, since 3×20557088523³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20557088543) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30545115 + ... + 30545787.

Almost surely, 2^20557088523 is an apocalyptic number.

20557088523 is a deficient number, since it is larger than the sum of its proper divisors (10705230237).

20557088523 is an frugal number, since it uses more digits than its factorization.

20557088523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 20557088523 in words is "twenty billion, five hundred fifty-seven million, eighty-eight thousand, five hundred twenty-three".