18319419 has 32 divisors (see below), whose sum is σ = 28723200. Its totient is φ = 11521440.

The previous prime is 18319417. The next prime is 18319429. The reversal of 18319419 is 91491381.

It is not a de Polignac number, because 18319419 - 2¹ = 18319417 is a prime.

It is a super-2 number, since 2×18319419² = 671202224995122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18319417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35737 + ... + 36245.

It is an arithmetic number, because the mean of its divisors is an integer number (897600).

Almost surely, 2^18319419 is an apocalyptic number.

18319419 is a deficient number, since it is larger than the sum of its proper divisors (10403781).

18319419 is a wasteful number, since it uses less digits than its factorization.

18319419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 586 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 18319419 is about 4280.1190404006. The cubic root of 18319419 is about 263.6152712164.

The spelling of 18319419 in words is "eighteen million, three hundred nineteen thousand, four hundred nineteen".