18859473 has 12 divisors (see below), whose sum is σ = 28250768. Its totient is φ = 12572820.

The previous prime is 18859469. The next prime is 18859487. The reversal of 18859473 is 37495881.

It is not a de Polignac number, because 18859473 - 2² = 18859469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18859453) 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, 38563 + ... + 39048.

Almost surely, 2^18859473 is an apocalyptic number.

It is an amenable number.

18859473 is a deficient number, since it is larger than the sum of its proper divisors (9391295).

18859473 is an frugal number, since it uses more digits than its factorization.

18859473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77626 (or 77614 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18859473 is about 4342.7494746992. The cubic root of 18859473 is about 266.1806722888.

The spelling of 18859473 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred seventy-three".