18547842 has 32 divisors (see below), whose sum is σ = 37914624. Its totient is φ = 6048000.

The previous prime is 18547831. The next prime is 18547847. The reversal of 18547842 is 24874581.

It is a happy number.

It is a cake number, because a cake can be divided into 18547842 parts by 481 planar cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 18547842.

It is not an unprimeable number, because it can be changed into a prime (18547847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76842 + ... + 77082.

It is an arithmetic number, because the mean of its divisors is an integer number (1184832).

Almost surely, 2^18547842 is an apocalyptic number.

18547842 is an abundant number, since it is smaller than the sum of its proper divisors (19366782).

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

18547842 is a wasteful number, since it uses less digits than its factorization.

18547842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its digits is 71680, while the sum is 39.

The square root of 18547842 is about 4306.7205620983. The cubic root of 18547842 is about 264.7064127281.

The spelling of 18547842 in words is "eighteen million, five hundred forty-seven thousand, eight hundred forty-two".