18829980 has 108 divisors (see below), whose sum is σ = 61949160. Its totient is φ = 4627584.

The previous prime is 18829919. The next prime is 18830023. The reversal of 18829980 is 8992881.

It is a super-3 number, since 3×18829980³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30111 + ... + 30729.

Almost surely, 2^18829980 is an apocalyptic number.

18829980 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 18829980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30974580).

18829980 is an abundant number, since it is smaller than the sum of its proper divisors (43119180).

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

18829980 is a wasteful number, since it uses less digits than its factorization.

18829980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 18829980 is about 4339.3524862588. The cubic root of 18829980 is about 266.0418461687.

The spelling of 18829980 in words is "eighteen million, eight hundred twenty-nine thousand, nine hundred eighty".