18385653100 has 36 divisors (see below), whose sum is σ = 39902756824. Its totient is φ = 7353175680.

The previous prime is 18385653071. The next prime is 18385653103. The reversal of 18385653100 is 135658381.

It is a super-2 number, since 2×18385653100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18385653103) 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, 1296247 + ... + 1310353.

Almost surely, 2^18385653100 is an apocalyptic number.

18385653100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18385653100 is an abundant number, since it is smaller than the sum of its proper divisors (21517103724).

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

18385653100 is a wasteful number, since it uses less digits than its factorization.

18385653100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27154 (or 27147 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 18385653100 in words is "eighteen billion, three hundred eighty-five million, six hundred fifty-three thousand, one hundred".