18879572551 has 12 divisors (see below), whose sum is σ = 22429230048. Its totient is φ = 15838180512.

The previous prime is 18879572501. The next prime is 18879572573. The reversal of 18879572551 is 15527597881.

It is a de Polignac number, because none of the positive numbers 2^k-18879572551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18879572501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4096606 + ... + 4101211.

It is an arithmetic number, because the mean of its divisors is an integer number (1869102504).

Almost surely, 2^18879572551 is an apocalyptic number.

18879572551 is a deficient number, since it is larger than the sum of its proper divisors (3549657497).

18879572551 is an equidigital number, since it uses as much as digits as its factorization.

18879572551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8197878 (or 8197871 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 58.

The spelling of 18879572551 in words is "eighteen billion, eight hundred seventy-nine million, five hundred seventy-two thousand, five hundred fifty-one".