18992193 has 16 divisors (see below), whose sum is σ = 27698112. Its totient is φ = 11480000.

The previous prime is 18992161. The next prime is 18992209. The reversal of 18992193 is 39129981.

It is a cyclic number.

It is not a de Polignac number, because 18992193 - 2⁵ = 18992161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18992123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22723 + ... + 23543.

It is an arithmetic number, because the mean of its divisors is an integer number (1731132).

Almost surely, 2^18992193 is an apocalyptic number.

It is an amenable number.

18992193 is a deficient number, since it is larger than the sum of its proper divisors (8705919).

18992193 is a wasteful number, since it uses less digits than its factorization.

18992193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its digits is 34992, while the sum is 42.

The square root of 18992193 is about 4358.0033272130. The cubic root of 18992193 is about 266.8036121255.

The spelling of 18992193 in words is "eighteen million, nine hundred ninety-two thousand, one hundred ninety-three".