18038534 has 8 divisors (see below), whose sum is σ = 27129600. Its totient is φ = 8995336.

The previous prime is 18038533. The next prime is 18038539. The reversal of 18038534 is 43583081.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18038534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11009 + ... + 12540.

It is an arithmetic number, because the mean of its divisors is an integer number (3391200).

Almost surely, 2^18038534 is an apocalyptic number.

18038534 is a deficient number, since it is larger than the sum of its proper divisors (9091066).

18038534 is a wasteful number, since it uses less digits than its factorization.

18038534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23934.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 18038534 is about 4247.1795347030. The cubic root of 18038534 is about 262.2610202921.

The spelling of 18038534 in words is "eighteen million, thirty-eight thousand, five hundred thirty-four".