18268487268 has 24 divisors (see below), whose sum is σ = 42639209760. Its totient is φ = 6087675840.

The previous prime is 18268487261. The next prime is 18268487269. The reversal of 18268487268 is 86278486281.

It is a super-2 number, since 2×18268487268² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18268487261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185353 + ... + 266256.

It is an arithmetic number, because the mean of its divisors is an integer number (1776633740).

Almost surely, 2^18268487268 is an apocalyptic number.

It is an amenable number.

18268487268 is an abundant number, since it is smaller than the sum of its proper divisors (24370722492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18268487268 is a wasteful number, since it uses less digits than its factorization.

18268487268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454987 (or 454985 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 60.

The spelling of 18268487268 in words is "eighteen billion, two hundred sixty-eight million, four hundred eighty-seven thousand, two hundred sixty-eight".