18199077 has 16 divisors (see below), whose sum is σ = 26976768. Its totient is φ = 10837440.

The previous prime is 18199073. The next prime is 18199117. The reversal of 18199077 is 77099181.

It is a happy number.

It is not a de Polignac number, because 18199077 - 2² = 18199073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6318 + ... + 8735.

It is an arithmetic number, because the mean of its divisors is an integer number (1686048).

Almost surely, 2^18199077 is an apocalyptic number.

It is an amenable number.

18199077 is a deficient number, since it is larger than the sum of its proper divisors (8777691).

18199077 is a wasteful number, since it uses less digits than its factorization.

18199077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 18199077 is about 4266.0376229002. The cubic root of 18199077 is about 263.0367647043.

The spelling of 18199077 in words is "eighteen million, one hundred ninety-nine thousand, seventy-seven".