18988898852 has 36 divisors (see below), whose sum is σ = 42170156784. Its totient is φ = 7398271440.

The previous prime is 18988898843. The next prime is 18988898879. The reversal of 18988898852 is 25889888981.

It is a super-2 number, since 2×18988898852² (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 18988898852.

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 11 ways as a sum of consecutive naturals, for example, 4401578 + ... + 4405889.

It is an arithmetic number, because the mean of its divisors is an integer number (1171393244).

Almost surely, 2^18988898852 is an apocalyptic number.

It is an amenable number.

18988898852 is an abundant number, since it is smaller than the sum of its proper divisors (23181257932).

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

18988898852 is a wasteful number, since it uses less digits than its factorization.

18988898852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8807496 (or 8807487 counting only the distinct ones).

The product of its digits is 212336640, while the sum is 74.

The spelling of 18988898852 in words is "eighteen billion, nine hundred eighty-eight million, eight hundred ninety-eight thousand, eight hundred fifty-two".