18869716 has 6 divisors (see below), whose sum is σ = 33022010. Its totient is φ = 9434856.

The previous prime is 18869713. The next prime is 18869723. The reversal of 18869716 is 61796881.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 2709316 = 4020^2 + 1646^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18869713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2358711 + ... + 2358718.

Almost surely, 2^18869716 is an apocalyptic number.

It is an amenable number.

18869716 is a deficient number, since it is larger than the sum of its proper divisors (14152294).

18869716 is a wasteful number, since it uses less digits than its factorization.

18869716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717433 (or 4717431 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 18869716 is about 4343.9286366146. The cubic root of 18869716 is about 266.2288531185.

The spelling of 18869716 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred sixteen".