18849720 has 32 divisors (see below), whose sum is σ = 56549520. Its totient is φ = 5026560.

The previous prime is 18849707. The next prime is 18849749. The reversal of 18849720 is 2794881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78421 + ... + 78660.

Almost surely, 2^18849720 is an apocalyptic number.

18849720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18849720 is an abundant number, since it is smaller than the sum of its proper divisors (37699800).

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

18849720 is a wasteful number, since it uses less digits than its factorization.

18849720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157095 (or 157091 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 18849720 is about 4341.6264233580. The cubic root of 18849720 is about 266.1347800957.

The spelling of 18849720 in words is "eighteen million, eight hundred forty-nine thousand, seven hundred twenty".