18670457 has 16 divisors (see below), whose sum is σ = 21506688. Its totient is φ = 16072320.

The previous prime is 18670447. The next prime is 18670507. The reversal of 18670457 is 75407681.

It is a cyclic number.

It is not a de Polignac number, because 18670457 - 2¹⁰ = 18669433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18670457.

It is not an unprimeable number, because it can be changed into a prime (18670427) 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, 11498 + ... + 13020.

It is an arithmetic number, because the mean of its divisors is an integer number (1344168).

Almost surely, 2^18670457 is an apocalyptic number.

It is an amenable number.

18670457 is a deficient number, since it is larger than the sum of its proper divisors (2836231).

18670457 is a wasteful number, since it uses less digits than its factorization.

18670457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 18670457 is about 4320.9324225218. The cubic root of 18670457 is about 265.2884340175.

The spelling of 18670457 in words is "eighteen million, six hundred seventy thousand, four hundred fifty-seven".