18280572368 has 20 divisors (see below), whose sum is σ = 35420957988. Its totient is φ = 9139680000.

The previous prime is 18280572341. The next prime is 18280572371. The reversal of 18280572368 is 86327508281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8012398144 + 10268174224 = 89512^2 + 101332^2 .

It is a super-2 number, since 2×18280572368² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304868 + ... + 359868.

Almost surely, 2^18280572368 is an apocalyptic number.

It is an amenable number.

18280572368 is a deficient number, since it is larger than the sum of its proper divisors (17140385620).

18280572368 is a wasteful number, since it uses less digits than its factorization.

18280572368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75782 (or 75776 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 18280572368 in words is "eighteen billion, two hundred eighty million, five hundred seventy-two thousand, three hundred sixty-eight".