18385474 has 8 divisors (see below), whose sum is σ = 27614268. Its totient is φ = 9180720.

The previous prime is 18385463. The next prime is 18385481. The reversal of 18385474 is 47458381.

It can be written as a sum of positive squares in 2 ways, for example, as 17164449 + 1221025 = 4143^2 + 1105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

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, 3957 + ... + 7240.

Almost surely, 2^18385474 is an apocalyptic number.

18385474 is a deficient number, since it is larger than the sum of its proper divisors (9228794).

18385474 is a wasteful number, since it uses less digits than its factorization.

18385474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12020.

The product of its digits is 107520, while the sum is 40.

The square root of 18385474 is about 4287.8285879918. The cubic root of 18385474 is about 263.9317335732.

The spelling of 18385474 in words is "eighteen million, three hundred eighty-five thousand, four hundred seventy-four".