18394856 has 8 divisors (see below), whose sum is σ = 34490370. Its totient is φ = 9197424.

The previous prime is 18394847. The next prime is 18394861. The reversal of 18394856 is 65849381.

It can be written as a sum of positive squares in only one way, i.e., 13942756 + 4452100 = 3734^2 + 2110^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1149671 + ... + 1149686.

Almost surely, 2^18394856 is an apocalyptic number.

It is an amenable number.

18394856 is a deficient number, since it is larger than the sum of its proper divisors (16095514).

18394856 is a wasteful number, since it uses less digits than its factorization.

18394856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299363 (or 2299359 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 18394856 is about 4288.9224754010. The cubic root of 18394856 is about 263.9766202130.

The spelling of 18394856 in words is "eighteen million, three hundred ninety-four thousand, eight hundred fifty-six".