18648980 has 48 divisors (see below), whose sum is σ = 46212096. Its totient is φ = 6186240.

The previous prime is 18648979. The next prime is 18648991. The reversal of 18648980 is 8984681.

It is a happy number.

It is a congruent 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, 2192 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (962752).

Almost surely, 2^18648980 is an apocalyptic number.

18648980 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 18648980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23106048).

18648980 is an abundant number, since it is smaller than the sum of its proper divisors (27563116).

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

18648980 is a wasteful number, since it uses less digits than its factorization.

18648980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344 (or 4342 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18648980 is about 4318.4464799277. The cubic root of 18648980 is about 265.1866727915.

The spelling of 18648980 in words is "eighteen million, six hundred forty-eight thousand, nine hundred eighty".