18700140 has 48 divisors (see below), whose sum is σ = 52627680. Its totient is φ = 4961280.

The previous prime is 18700117. The next prime is 18700163. The reversal of 18700140 is 4100781.

It is an interprime number because it is at equal distance from previous prime (18700117) and next prime (18700163).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13060 + ... + 14420.

It is an arithmetic number, because the mean of its divisors is an integer number (1096410).

Almost surely, 2^18700140 is an apocalyptic number.

18700140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18700140 is an abundant number, since it is smaller than the sum of its proper divisors (33927540).

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

18700140 is a wasteful number, since it uses less digits than its factorization.

18700140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18700140 is about 4324.3658494628. The cubic root of 18700140 is about 265.4289481138.

The spelling of 18700140 in words is "eighteen million, seven hundred thousand, one hundred forty".