18198736 has 20 divisors (see below), whose sum is σ = 36398464. Its totient is φ = 8805600.

The previous prime is 18198701. The next prime is 18198737. The reversal of 18198736 is 63789181.

18198736 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18198692 and 18198701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17850 + ... + 18841.

Almost surely, 2^18198736 is an apocalyptic number.

18198736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18198736 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18198736 is a wasteful number, since it uses less digits than its factorization.

18198736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36730 (or 36724 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 18198736 is about 4265.9976558831. The cubic root of 18198736 is about 263.0351218354.

The spelling of 18198736 in words is "eighteen million, one hundred ninety-eight thousand, seven hundred thirty-six".