18821468079 has 6 divisors (see below), whose sum is σ = 27186565016. Its totient is φ = 12547645380.

The previous prime is 18821468063. The next prime is 18821468087. The reversal of 18821468079 is 97086412881.

It is not a de Polignac number, because 18821468079 - 2⁴ = 18821468063 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 (18821468779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1045637107 + ... + 1045637124.

Almost surely, 2^18821468079 is an apocalyptic number.

18821468079 is a deficient number, since it is larger than the sum of its proper divisors (8365096937).

18821468079 is a wasteful number, since it uses less digits than its factorization.

18821468079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091274237 (or 2091274234 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 18821468079 in words is "eighteen billion, eight hundred twenty-one million, four hundred sixty-eight thousand, seventy-nine".