18037494 has 12 divisors (see below), whose sum is σ = 39081276. Its totient is φ = 6012492.

The previous prime is 18037483. The next prime is 18037501. The reversal of 18037494 is 49473081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 501024 + ... + 501059.

It is an arithmetic number, because the mean of its divisors is an integer number (3256773).

Almost surely, 2^18037494 is an apocalyptic number.

18037494 is an abundant number, since it is smaller than the sum of its proper divisors (21043782).

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

18037494 is a wasteful number, since it uses less digits than its factorization.

18037494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002091 (or 1002088 counting only the distinct ones).

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

The square root of 18037494 is about 4247.0570987450. The cubic root of 18037494 is about 262.2559800321.

The spelling of 18037494 in words is "eighteen million, thirty-seven thousand, four hundred ninety-four".