18936969156 has 96 divisors (see below), whose sum is σ = 56238336000. Its totient is φ = 5398143264.

The previous prime is 18936969131. The next prime is 18936969167. The reversal of 18936969156 is 65196963981.

18936969156 is a `hidden beast` number, since 189 + 369 + 6 + 91 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 18936969093 and 18936969102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 303355 + ... + 360413.

It is an arithmetic number, because the mean of its divisors is an integer number (585816000).

Almost surely, 2^18936969156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18936969156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28119168000).

18936969156 is an abundant number, since it is smaller than the sum of its proper divisors (37301366844).

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

18936969156 is a wasteful number, since it uses less digits than its factorization.

18936969156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57518 (or 57510 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The spelling of 18936969156 in words is "eighteen billion, nine hundred thirty-six million, nine hundred sixty-nine thousand, one hundred fifty-six".