18057742 has 4 divisors (see below), whose sum is σ = 27086616. Its totient is φ = 9028870.

The previous prime is 18057731. The next prime is 18057751. The reversal of 18057742 is 24775081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×18057742² = 652164092277128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18057698 and 18057707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4514434 + ... + 4514437.

It is an arithmetic number, because the mean of its divisors is an integer number (6771654).

Almost surely, 2^18057742 is an apocalyptic number.

18057742 is a deficient number, since it is larger than the sum of its proper divisors (9028874).

18057742 is an equidigital number, since it uses as much as digits as its factorization.

18057742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9028873.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 18057742 is about 4249.4401984261. The cubic root of 18057742 is about 262.3540752063.

The spelling of 18057742 in words is "eighteen million, fifty-seven thousand, seven hundred forty-two".