18719012 has 12 divisors (see below), whose sum is σ = 35278236. Its totient is φ = 8639520.

The previous prime is 18719011. The next prime is 18719021. The reversal of 18719012 is 21091781.

It can be written as a sum of positive squares in 2 ways, for example, as 9634816 + 9084196 = 3104^2 + 3014^2 .

It is a super-2 number, since 2×18719012² = 700802820512288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18719011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179939 + ... + 180042.

It is an arithmetic number, because the mean of its divisors is an integer number (2939853).

Almost surely, 2^18719012 is an apocalyptic number.

It is an amenable number.

18719012 is a deficient number, since it is larger than the sum of its proper divisors (16559224).

18719012 is a wasteful number, since it uses less digits than its factorization.

18719012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359998 (or 359996 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 18719012 is about 4326.5473532599. The cubic root of 18719012 is about 265.5182075343.

The spelling of 18719012 in words is "eighteen million, seven hundred nineteen thousand, twelve".