18396719 has 6 divisors (see below), whose sum is σ = 20221320. Its totient is φ = 16724180.

The previous prime is 18396713. The next prime is 18396751. The reversal of 18396719 is 91769381.

It is not a de Polignac number, because 18396719 - 2⁸ = 18396463 is a prime.

It is a super-2 number, since 2×18396719² = 676878539929922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18396719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75899 + ... + 76140.

It is an arithmetic number, because the mean of its divisors is an integer number (3370220).

Almost surely, 2^18396719 is an apocalyptic number.

18396719 is a deficient number, since it is larger than the sum of its proper divisors (1824601).

18396719 is a wasteful number, since it uses less digits than its factorization.

18396719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152061 (or 152050 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 18396719 is about 4289.1396573206. The cubic root of 18396719 is about 263.9855316145.

It can be divided in two parts, 1839 and 6719, that added together give a palindrome (8558).

The spelling of 18396719 in words is "eighteen million, three hundred ninety-six thousand, seven hundred nineteen".