18870790979 has 8 divisors (see below), whose sum is σ = 19695612672. Its totient is φ = 18046332040.

The previous prime is 18870790973. The next prime is 18870791003. The reversal of 18870790979 is 97909707881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18870790979 - 2⁸ = 18870790723 is a prime.

It is a super-2 number, since 2×18870790979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18870790973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18434 + ... + 195144.

It is an arithmetic number, because the mean of its divisors is an integer number (2461951584).

Almost surely, 2^18870790979 is an apocalyptic number.

18870790979 is a deficient number, since it is larger than the sum of its proper divisors (824821693).

18870790979 is a wasteful number, since it uses less digits than its factorization.

18870790979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181377.

The product of its (nonzero) digits is 16003008, while the sum is 65.

The spelling of 18870790979 in words is "eighteen billion, eight hundred seventy million, seven hundred ninety thousand, nine hundred seventy-nine".