18905620679 has 12 divisors (see below), whose sum is σ = 20808328800. Its totient is φ = 17163960000.

The previous prime is 18905620651. The next prime is 18905620687. The reversal of 18905620679 is 97602650981.

It is not a de Polignac number, because 18905620679 - 2²⁰ = 18904572103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18905620679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18905620639) 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, 13154 + ... + 194895.

It is an arithmetic number, because the mean of its divisors is an integer number (1734027400).

Almost surely, 2^18905620679 is an apocalyptic number.

18905620679 is a deficient number, since it is larger than the sum of its proper divisors (1902708121).

18905620679 is a wasteful number, since it uses less digits than its factorization.

18905620679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208822 (or 208811 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 18905620679 in words is "eighteen billion, nine hundred five million, six hundred twenty thousand, six hundred seventy-nine".