18957708 has 108 divisors (see below), whose sum is σ = 60874632. Its totient is φ = 4919040.

The previous prime is 18957707. The next prime is 18957721. The reversal of 18957708 is 80775981.

It is a super-2 number, since 2×18957708² = 718789385226528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18957707) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18916 + ... + 19892.

It is an arithmetic number, because the mean of its divisors is an integer number (563654).

Almost surely, 2^18957708 is an apocalyptic number.

18957708 is a gapful number since it is divisible by the number (18) 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 18957708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30437316).

18957708 is an abundant number, since it is smaller than the sum of its proper divisors (41916924).

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

18957708 is a wasteful number, since it uses less digits than its factorization.

18957708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 18957708 is about 4354.0450158445. The cubic root of 18957708 is about 266.6420317521.

The spelling of 18957708 in words is "eighteen million, nine hundred fifty-seven thousand, seven hundred eight".