18996869808 has 240 divisors, whose sum is σ = 62625116736. Its totient is φ = 5262704640.

The previous prime is 18996869791. The next prime is 18996869819. The reversal of 18996869808 is 80896869981.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7148416 + ... + 7151072.

Almost surely, 2^18996869808 is an apocalyptic number.

18996869808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18996869808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31312558368).

18996869808 is an abundant number, since it is smaller than the sum of its proper divisors (43628246928).

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

18996869808 is a wasteful number, since it uses less digits than its factorization.

18996869808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892 (or 2883 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 72.

The spelling of 18996869808 in words is "eighteen billion, nine hundred ninety-six million, eight hundred sixty-nine thousand, eight hundred eight".