18858353680 has 40 divisors (see below), whose sum is σ = 43899100992. Its totient is φ = 7534149504.

The previous prime is 18858353669. The next prime is 18858353681. The reversal of 18858353680 is 8635385881.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18858353681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77374 + ... + 209053.

Almost surely, 2^18858353680 is an apocalyptic number.

18858353680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18858353680 is an abundant number, since it is smaller than the sum of its proper divisors (25040747312).

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

18858353680 is a wasteful number, since it uses less digits than its factorization.

18858353680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287263 (or 287257 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 18858353680 in words is "eighteen billion, eight hundred fifty-eight million, three hundred fifty-three thousand, six hundred eighty".