18061542 has 20 divisors (see below), whose sum is σ = 40471596. Its totient is φ = 6020460.

The previous prime is 18061529. The next prime is 18061543. The reversal of 18061542 is 24516081.

18061542 is a `hidden beast` number, since 1 + 8 + 0 + 615 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18061543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55584 + ... + 55907.

Almost surely, 2^18061542 is an apocalyptic number.

18061542 is an abundant number, since it is smaller than the sum of its proper divisors (22410054).

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

18061542 is a wasteful number, since it uses less digits than its factorization.

18061542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111505 (or 111496 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18061542 is about 4249.8872926232. The cubic root of 18061542 is about 262.3724768345.

The spelling of 18061542 in words is "eighteen million, sixty-one thousand, five hundred forty-two".