18779900823 has 12 divisors (see below), whose sum is σ = 28061921160. Its totient is φ = 12088211856.

The previous prime is 18779900807. The next prime is 18779900831. The reversal of 18779900823 is 32800997781.

It is not a de Polignac number, because 18779900823 - 2⁴ = 18779900807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18779900823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18779900123) 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, 35976561 + ... + 35977082.

It is an arithmetic number, because the mean of its divisors is an integer number (2338493430).

Almost surely, 2^18779900823 is an apocalyptic number.

18779900823 is a deficient number, since it is larger than the sum of its proper divisors (9282020337).

18779900823 is a wasteful number, since it uses less digits than its factorization.

18779900823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71953678 (or 71953675 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 18779900823 in words is "eighteen billion, seven hundred seventy-nine million, nine hundred thousand, eight hundred twenty-three".