18031542 has 16 divisors (see below), whose sum is σ = 36129792. Its totient is φ = 5999400.

The previous prime is 18031483. The next prime is 18031547. The reversal of 18031542 is 24513081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18031547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (2258112).

Almost surely, 2^18031542 is an apocalyptic number.

18031542 is an abundant number, since it is smaller than the sum of its proper divisors (18098250).

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

18031542 is a wasteful number, since it uses less digits than its factorization.

18031542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18031542 is about 4246.3563204234. The cubic root of 18031542 is about 262.2271305086.

The spelling of 18031542 in words is "eighteen million, thirty-one thousand, five hundred forty-two".