18746742 has 32 divisors (see below), whose sum is σ = 43137792. Its totient is φ = 5320224.

The previous prime is 18746729. The next prime is 18746773. The reversal of 18746742 is 24764781.

It is a super-2 number, since 2×18746742² = 702880671229128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18746742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5173 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (1348056).

Almost surely, 2^18746742 is an apocalyptic number.

18746742 is an abundant number, since it is smaller than the sum of its proper divisors (24391050).

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

18746742 is a wasteful number, since it uses less digits than its factorization.

18746742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012.

The product of its digits is 75264, while the sum is 39.

The square root of 18746742 is about 4329.7508011432. The cubic root of 18746742 is about 265.6492541083.

The spelling of 18746742 in words is "eighteen million, seven hundred forty-six thousand, seven hundred forty-two".