18490473 has 12 divisors (see below), whose sum is σ = 27330160. Its totient is φ = 12040056.

The previous prime is 18490471. The next prime is 18490489. The reversal of 18490473 is 37409481.

It is a happy number.

18490473 is a `hidden beast` number, since 184 + 9 + 0 + 473 = 666.

It is not a de Polignac number, because 18490473 - 2¹ = 18490471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18490471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23503 + ... + 24276.

Almost surely, 2^18490473 is an apocalyptic number.

It is an amenable number.

18490473 is a deficient number, since it is larger than the sum of its proper divisors (8839687).

18490473 is a wasteful number, since it uses less digits than its factorization.

18490473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47828 (or 47825 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18490473 is about 4300.0549996483. The cubic root of 18490473 is about 264.4332160582.

The spelling of 18490473 in words is "eighteen million, four hundred ninety thousand, four hundred seventy-three".