18859492 has 24 divisors (see below), whose sum is σ = 34468280. Its totient is φ = 9020160.

The previous prime is 18859487. The next prime is 18859493. The reversal of 18859492 is 29495881.

It can be written as a sum of positive squares in 4 ways, for example, as 4901796 + 13957696 = 2214^2 + 3736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18859493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7984 + ... + 10072.

Almost surely, 2^18859492 is an apocalyptic number.

It is an amenable number.

18859492 is a deficient number, since it is larger than the sum of its proper divisors (15608788).

18859492 is a wasteful number, since it uses less digits than its factorization.

18859492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2189 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 18859492 is about 4342.7516622529. The cubic root of 18859492 is about 266.1807616768.

The spelling of 18859492 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred ninety-two".