18107436820 has 48 divisors (see below), whose sum is σ = 41492336256. Its totient is φ = 6582960000.

The previous prime is 18107436799. The next prime is 18107436821. The reversal of 18107436820 is 2863470181.

It is a Smith number, since the sum of its digits (40) 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 (18107436821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1346530 + ... + 1359910.

It is an arithmetic number, because the mean of its divisors is an integer number (864423672).

Almost surely, 2^18107436820 is an apocalyptic number.

18107436820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18107436820 is an abundant number, since it is smaller than the sum of its proper divisors (23384899436).

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

18107436820 is a wasteful number, since it uses less digits than its factorization.

18107436820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19552 (or 19550 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 18107436820 in words is "eighteen billion, one hundred seven million, four hundred thirty-six thousand, eight hundred twenty".