18739469976 has 24 divisors (see below), whose sum is σ = 46850351580. Its totient is φ = 6246266448.

The previous prime is 18739469953. The next prime is 18739470011. The reversal of 18739469976 is 67996493781.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18739469976.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656661 + ... + 684603.

Almost surely, 2^18739469976 is an apocalyptic number.

It is an amenable number.

18739469976 is an abundant number, since it is smaller than the sum of its proper divisors (28110881604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18739469976 is an frugal number, since it uses more digits than its factorization.

18739469976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55895 (or 27948 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 69.

The spelling of 18739469976 in words is "eighteen billion, seven hundred thirty-nine million, four hundred sixty-nine thousand, nine hundred seventy-six".