18855897048 has 48 divisors (see below), whose sum is σ = 52313625000. Its totient is φ = 6131998080.

The previous prime is 18855897041. The next prime is 18855897083. The reversal of 18855897048 is 84079855881.

18855897048 is a `hidden beast` number, since 1 + 8 + 8 + 5 + 589 + 7 + 0 + 48 = 666.

It is a super-2 number, since 2×18855897048² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18855897041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3190798 + ... + 3196701.

Almost surely, 2^18855897048 is an apocalyptic number.

18855897048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18855897048 is an abundant number, since it is smaller than the sum of its proper divisors (33457727952).

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

18855897048 is a wasteful number, since it uses less digits than its factorization.

18855897048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387552 (or 6387545 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 63.

The spelling of 18855897048 in words is "eighteen billion, eight hundred fifty-five million, eight hundred ninety-seven thousand, forty-eight".