18745494 has 16 divisors (see below), whose sum is σ = 37537968. Its totient is φ = 6240672.

The previous prime is 18745477. The next prime is 18745537. The reversal of 18745494 is 49454781.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5304 + ... + 8100.

It is an arithmetic number, because the mean of its divisors is an integer number (2346123).

Almost surely, 2^18745494 is an apocalyptic number.

18745494 is an abundant number, since it is smaller than the sum of its proper divisors (18792474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18745494 is a wasteful number, since it uses less digits than its factorization.

18745494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919.

The product of its digits is 161280, while the sum is 42.

The square root of 18745494 is about 4329.6066795957. The cubic root of 18745494 is about 265.6433590817.

The spelling of 18745494 in words is "eighteen million, seven hundred forty-five thousand, four hundred ninety-four".