18940716 has 60 divisors (see below), whose sum is σ = 50494752. Its totient is φ = 6188832.

The previous prime is 18940709. The next prime is 18940717. The reversal of 18940716 is 61704981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18940717) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16621 + ... + 17723.

Almost surely, 2^18940716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18940716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25247376).

18940716 is an abundant number, since it is smaller than the sum of its proper divisors (31554036).

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

18940716 is a wasteful number, since it uses less digits than its factorization.

18940716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18940716 is about 4352.0932894413. The cubic root of 18940716 is about 266.5623432204.

The spelling of 18940716 in words is "eighteen million, nine hundred forty thousand, seven hundred sixteen".