18923840896 has 32 divisors (see below), whose sum is σ = 37711372680. Its totient is φ = 9459025920.

The previous prime is 18923840863. The next prime is 18923840909. The reversal of 18923840896 is 69804832981.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×18923840896² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18923840896.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433176 + ... + 474856.

Almost surely, 2^18923840896 is an apocalyptic number.

18923840896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18923840896 is a deficient number, since it is larger than the sum of its proper divisors (18787531784).

18923840896 is an equidigital number, since it uses as much as digits as its factorization.

18923840896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45242 (or 45230 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 18923840896 in words is "eighteen billion, nine hundred twenty-three million, eight hundred forty thousand, eight hundred ninety-six".