18220259619 has 12 divisors (see below), whose sum is σ = 26351604136. Its totient is φ = 12131400672.

The previous prime is 18220259569. The next prime is 18220259639. The reversal of 18220259619 is 91695202281.

It is a happy number.

18220259619 is a `hidden beast` number, since 1 + 8 + 2 + 2 + 0 + 25 + 9 + 619 = 666.

It is not a de Polignac number, because 18220259619 - 2⁸ = 18220259363 is a prime.

It is a super-2 number, since 2×18220259619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18220259639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1279114 + ... + 1293279.

Almost surely, 2^18220259619 is an apocalyptic number.

18220259619 is a deficient number, since it is larger than the sum of its proper divisors (8131344517).

18220259619 is a wasteful number, since it uses less digits than its factorization.

18220259619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573186 (or 2573183 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 18220259619 in words is "eighteen billion, two hundred twenty million, two hundred fifty-nine thousand, six hundred nineteen".