18819024156 has 72 divisors (see below), whose sum is σ = 47775305760. Its totient is φ = 6246042624.

The previous prime is 18819024139. The next prime is 18819024167. The reversal of 18819024156 is 65142091881.

It is a happy number.

It is a super-2 number, since 2×18819024156² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12117076 + ... + 12118628.

Almost surely, 2^18819024156 is an apocalyptic number.

It is an amenable number.

18819024156 is an abundant number, since it is smaller than the sum of its proper divisors (28956281604).

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

18819024156 is a wasteful number, since it uses less digits than its factorization.

18819024156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18819024156 in words is "eighteen billion, eight hundred nineteen million, twenty-four thousand, one hundred fifty-six".