18715040 has 24 divisors (see below), whose sum is σ = 44214660. Its totient is φ = 7485952.

The previous prime is 18715013. The next prime is 18715051. The reversal of 18715040 is 4051781.

It can be written as a sum of positive squares in 2 ways, for example, as 17875984 + 839056 = 4228^2 + 916^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58325 + ... + 58644.

Almost surely, 2^18715040 is an apocalyptic number.

18715040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18715040 is an abundant number, since it is smaller than the sum of its proper divisors (25499620).

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

18715040 is a wasteful number, since it uses less digits than its factorization.

18715040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116984 (or 116976 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18715040 is about 4326.0883023813. The cubic root of 18715040 is about 265.4994260423.

The spelling of 18715040 in words is "eighteen million, seven hundred fifteen thousand, forty".