18698980 has 48 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 6870528.

The previous prime is 18698971. The next prime is 18699013. The reversal of 18698980 is 8989681.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13981 + ... + 15259.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^18698980 is an apocalyptic number.

18698980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18698980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21288960).

18698980 is an abundant number, since it is smaller than the sum of its proper divisors (23878940).

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

18698980 is a wasteful number, since it uses less digits than its factorization.

18698980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 18698980 is about 4324.2317236707. The cubic root of 18698980 is about 265.4234596710.

The spelling of 18698980 in words is "eighteen million, six hundred ninety-eight thousand, nine hundred eighty".