18942284 has 12 divisors (see below), whose sum is σ = 35099064. Its totient is φ = 8913984.

The previous prime is 18942283. The next prime is 18942293. The reversal of 18942284 is 48224981.

It is not an unprimeable number, because it can be changed into a prime (18942281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139214 + ... + 139349.

It is an arithmetic number, because the mean of its divisors is an integer number (2924922).

Almost surely, 2^18942284 is an apocalyptic number.

It is an amenable number.

18942284 is a deficient number, since it is larger than the sum of its proper divisors (16156780).

18942284 is a wasteful number, since it uses less digits than its factorization.

18942284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278584 (or 278582 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 18942284 is about 4352.2734289105. The cubic root of 18942284 is about 266.5696987717.

The spelling of 18942284 in words is "eighteen million, nine hundred forty-two thousand, two hundred eighty-four".