18980620 has 48 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 7128000.

The previous prime is 18980617. The next prime is 18980629. The reversal of 18980620 is 2608981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18980629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75495 + ... + 75745.

It is an arithmetic number, because the mean of its divisors is an integer number (882000).

Almost surely, 2^18980620 is an apocalyptic number.

18980620 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 18980620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21168000).

18980620 is an abundant number, since it is smaller than the sum of its proper divisors (23355380).

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

18980620 is a wasteful number, since it uses less digits than its factorization.

18980620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18980620 is about 4356.6753379154. The cubic root of 18980620 is about 266.7494083519.

It can be divided in two parts, 18980 and 620, that added together give a square (19600 = 140²).

The spelling of 18980620 in words is "eighteen million, nine hundred eighty thousand, six hundred twenty".