18980700 has 72 divisors (see below), whose sum is σ = 55413120. Its totient is φ = 5016000.

The previous prime is 18980693. The next prime is 18980729. The reversal of 18980700 is 708981.

18980700 = T₄₂₄ + T₄₂₅ + ... + T₅₇₄.

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 23 ways as a sum of consecutive naturals, for example, 45091 + ... + 45509.

Almost surely, 2^18980700 is an apocalyptic number.

18980700 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 18980700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27706560).

18980700 is an abundant number, since it is smaller than the sum of its proper divisors (36432420).

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

18980700 is a wasteful number, since it uses less digits than its factorization.

18980700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 18980700 is about 4356.6845192187. The cubic root of 18980700 is about 266.7497831188.

The spelling of 18980700 in words is "eighteen million, nine hundred eighty thousand, seven hundred".