18957316 has 27 divisors (see below), whose sum is σ = 38716167. Its totient is φ = 8098440.

The previous prime is 18957311. The next prime is 18957361. The reversal of 18957316 is 61375981.

The square root of 18957316 is 4354.

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

It is not an unprimeable number, because it can be changed into a prime (18957311) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 60801 + ... + 61111.

Almost surely, 2^18957316 is an apocalyptic number.

18957316 is the 4354-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18957316

18957316 is an abundant number, since it is smaller than the sum of its proper divisors (19758851).

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

18957316 is an equidigital number, since it uses as much as digits as its factorization.

18957316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 320 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The cubic root of 18957316 is about 266.6401938998.

The spelling of 18957316 in words is "eighteen million, nine hundred fifty-seven thousand, three hundred sixteen".