18975620 has 48 divisors (see below), whose sum is σ = 41510448. Its totient is φ = 7280640.

The previous prime is 18975571. The next prime is 18975641. The reversal of 18975620 is 2657981.

It can be written as a sum of positive squares in 8 ways, for example, as 5914624 + 13060996 = 2432^2 + 3614^2 .

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, 59702 + ... + 60018.

It is an arithmetic number, because the mean of its divisors is an integer number (864801).

Almost surely, 2^18975620 is an apocalyptic number.

18975620 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 18975620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20755224).

18975620 is an abundant number, since it is smaller than the sum of its proper divisors (22534828).

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

18975620 is a wasteful number, since it uses less digits than its factorization.

18975620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 18975620 is about 4356.1014680560. The cubic root of 18975620 is about 266.7259833325.

The spelling of 18975620 in words is "eighteen million, nine hundred seventy-five thousand, six hundred twenty".