18077198 has 4 divisors (see below), whose sum is σ = 27115800. Its totient is φ = 9038598.

The previous prime is 18077183. The next prime is 18077207. The reversal of 18077198 is 89177081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4519298 + ... + 4519301.

It is an arithmetic number, because the mean of its divisors is an integer number (6778950).

Almost surely, 2^18077198 is an apocalyptic number.

18077198 is a deficient number, since it is larger than the sum of its proper divisors (9038602).

18077198 is an equidigital number, since it uses as much as digits as its factorization.

18077198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038601.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 18077198 is about 4251.7288248429. The cubic root of 18077198 is about 262.4482643318.

The spelling of 18077198 in words is "eighteen million, seventy-seven thousand, one hundred ninety-eight".