18709442 has 16 divisors (see below), whose sum is σ = 29581632. Its totient is φ = 8857200.

The previous prime is 18709417. The next prime is 18709447. The reversal of 18709442 is 24490781.

It is not an unprimeable number, because it can be changed into a prime (18709447) 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, 2633 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (1848852).

Almost surely, 2^18709442 is an apocalyptic number.

18709442 is a deficient number, since it is larger than the sum of its proper divisors (10872190).

18709442 is a wasteful number, since it uses less digits than its factorization.

18709442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18709442 is about 4325.4412491675. The cubic root of 18709442 is about 265.4729515419.

The spelling of 18709442 in words is "eighteen million, seven hundred nine thousand, four hundred forty-two".