18766820079 has 24 divisors (see below), whose sum is σ = 31735765152. Its totient is φ = 10462337280.

The previous prime is 18766820057. The next prime is 18766820119. The reversal of 18766820079 is 97002866781.

It is a de Polignac number, because none of the positive numbers 2^k-18766820079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18766820179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3630174 + ... + 3635339.

It is an arithmetic number, because the mean of its divisors is an integer number (1322323548).

Almost surely, 2^18766820079 is an apocalyptic number.

18766820079 is a deficient number, since it is larger than the sum of its proper divisors (12968945073).

18766820079 is a wasteful number, since it uses less digits than its factorization.

18766820079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7265567 (or 7265564 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 18766820079 in words is "eighteen billion, seven hundred sixty-six million, eight hundred twenty thousand, seventy-nine".