18272407507 has 4 divisors (see below), whose sum is σ = 18277161136. Its totient is φ = 18267653880.

The previous prime is 18272407459. The next prime is 18272407511. The reversal of 18272407507 is 70570427281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70570427281 = 23 ⋅3068279447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18272407507 is a prime.

It is a super-2 number, since 2×18272407507² (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 (18272407547) 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, 2371044 + ... + 2378737.

It is an arithmetic number, because the mean of its divisors is an integer number (4569290284).

Almost surely, 2^18272407507 is an apocalyptic number.

18272407507 is a deficient number, since it is larger than the sum of its proper divisors (4753629).

18272407507 is an equidigital number, since it uses as much as digits as its factorization.

18272407507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753628.

The product of its (nonzero) digits is 219520, while the sum is 43.

The spelling of 18272407507 in words is "eighteen billion, two hundred seventy-two million, four hundred seven thousand, five hundred seven".