18038474 has 8 divisors (see below), whose sum is σ = 27081540. Its totient is φ = 9011296.

The previous prime is 18038453. The next prime is 18038533. The reversal of 18038474 is 47483081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 5257849 = 3575^2 + 2293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 6030.

Almost surely, 2^18038474 is an apocalyptic number.

18038474 is a deficient number, since it is larger than the sum of its proper divisors (9043066).

18038474 is a wasteful number, since it uses less digits than its factorization.

18038474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18038474 is about 4247.1724711860. The cubic root of 18038474 is about 262.2607295131.

The spelling of 18038474 in words is "eighteen million, thirty-eight thousand, four hundred seventy-four".