18539122 has 8 divisors (see below), whose sum is σ = 31781376. Its totient is φ = 7945332.

The previous prime is 18539113. The next prime is 18539123. The reversal of 18539122 is 22193581.

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

It is not an unprimeable number, because it can be changed into a prime (18539123) 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, 662098 + ... + 662125.

It is an arithmetic number, because the mean of its divisors is an integer number (3972672).

Almost surely, 2^18539122 is an apocalyptic number.

18539122 is a deficient number, since it is larger than the sum of its proper divisors (13242254).

18539122 is a wasteful number, since it uses less digits than its factorization.

18539122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324232.

The product of its digits is 4320, while the sum is 31.

The square root of 18539122 is about 4305.7080718507. The cubic root of 18539122 is about 264.6649235934.

The spelling of 18539122 in words is "eighteen million, five hundred thirty-nine thousand, one hundred twenty-two".