18198770 has 16 divisors (see below), whose sum is σ = 34482240. Its totient is φ = 6896304.

The previous prime is 18198757. The next prime is 18198779. The reversal of 18198770 is 7789181.

It is not an unprimeable number, because it can be changed into a prime (18198779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47702 + ... + 48081.

It is an arithmetic number, because the mean of its divisors is an integer number (2155140).

Almost surely, 2^18198770 is an apocalyptic number.

18198770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18198770 is a deficient number, since it is larger than the sum of its proper divisors (16283470).

18198770 is a wasteful number, since it uses less digits than its factorization.

18198770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95809.

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

The square root of 18198770 is about 4266.0016408811. The cubic root of 18198770 is about 263.0352856414.

The spelling of 18198770 in words is "eighteen million, one hundred ninety-eight thousand, seven hundred seventy".