18199960 has 32 divisors (see below), whose sum is σ = 41626800. Its totient is φ = 7159680.

The previous prime is 18199957. The next prime is 18199963. The reversal of 18199960 is 6999181.

It is an interprime number because it is at equal distance from previous prime (18199957) and next prime (18199963).

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199963) 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, 1290 + ... + 6169.

Almost surely, 2^18199960 is an apocalyptic number.

18199960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18199960 is an abundant number, since it is smaller than the sum of its proper divisors (23426840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18199960 is a wasteful number, since it uses less digits than its factorization.

18199960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7531 (or 7527 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 18199960 is about 4266.1411134654. The cubic root of 18199960 is about 263.0410187242.

The spelling of 18199960 in words is "eighteen million, one hundred ninety-nine thousand, nine hundred sixty".