18700420608 has 60 divisors (see below), whose sum is σ = 53970693348. Its totient is φ = 6233472000.

The previous prime is 18700420589. The next prime is 18700420633. The reversal of 18700420608 is 80602400781.

18700420608 is a `hidden beast` number, since 1 + 8 + 7 + 0 + 0 + 42 + 0 + 608 = 666.

It is a super-2 number, since 2×18700420608² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2024518 + ... + 2033733.

Almost surely, 2^18700420608 is an apocalyptic number.

18700420608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18700420608 is an abundant number, since it is smaller than the sum of its proper divisors (35270272740).

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

18700420608 is an equidigital number, since it uses as much as digits as its factorization.

18700420608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058275 (or 4058256 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 18700420608 in words is "eighteen billion, seven hundred million, four hundred twenty thousand, six hundred eight".