18696719 has 4 divisors (see below), whose sum is σ = 19796544. Its totient is φ = 17596896.

The previous prime is 18696649. The next prime is 18696721. The reversal of 18696719 is 91769681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91769681 = 61 ⋅1504421.

It is a cyclic number.

It is not a de Polignac number, because 18696719 - 2⁸ = 18696463 is a prime.

It is a super-2 number, since 2×18696719² = 699134602729922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18696749) 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, 549887 + ... + 549920.

It is an arithmetic number, because the mean of its divisors is an integer number (4949136).

Almost surely, 2^18696719 is an apocalyptic number.

18696719 is a deficient number, since it is larger than the sum of its proper divisors (1099825).

18696719 is a wasteful number, since it uses less digits than its factorization.

18696719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099824.

The product of its digits is 163296, while the sum is 47.

The square root of 18696719 is about 4323.9702820440. The cubic root of 18696719 is about 265.4127612865.

The spelling of 18696719 in words is "eighteen million, six hundred ninety-six thousand, seven hundred nineteen".