18922500 has 135 divisors (see below), whose sum is σ = 61902841. Its totient is φ = 4872000.

The previous prime is 18922489. The next prime is 18922511. The reversal of 18922500 is 522981.

The square root of 18922500 is 4350.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (18922489) and next prime (18922511).

It can be written as a sum of positive squares in 7 ways, for example, as 14152644 + 4769856 = 3762^2 + 2184^2 .

It is a super-2 number, since 2×18922500² = 716122012500000, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 652486 + ... + 652514.

Almost surely, 2^18922500 is an apocalyptic number.

18922500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18922500 is the 4350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18922500

18922500 is an abundant number, since it is smaller than the sum of its proper divisors (42980341).

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

18922500 is a wasteful number, since it uses less digits than its factorization.

18922500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The cubic root of 18922500 is about 266.4768614623.

The spelling of 18922500 in words is "eighteen million, nine hundred twenty-two thousand, five hundred".