18942190 has 16 divisors (see below), whose sum is σ = 34399728. Its totient is φ = 7509376.

The previous prime is 18942169. The next prime is 18942211. The reversal of 18942190 is 9124981.

It is an interprime number because it is at equal distance from previous prime (18942169) and next prime (18942211).

It is a super-2 number, since 2×18942190² = 717613123992200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7252 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (2149983).

Almost surely, 2^18942190 is an apocalyptic number.

18942190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18942190 is a deficient number, since it is larger than the sum of its proper divisors (15457538).

18942190 is a wasteful number, since it uses less digits than its factorization.

18942190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16883.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 18942190 is about 4352.2626299432. The cubic root of 18942190 is about 266.5692578253.

The spelling of 18942190 in words is "eighteen million, nine hundred forty-two thousand, one hundred ninety".