18281012715 has 72 divisors (see below), whose sum is σ = 37605216480. Its totient is φ = 8356929408.

The previous prime is 18281012681. The next prime is 18281012791. The reversal of 18281012715 is 51721018281.

It is not a de Polignac number, because 18281012715 - 2¹⁰ = 18281011691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18281012715.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 189831 + ... + 269439.

Almost surely, 2^18281012715 is an apocalyptic number.

18281012715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18281012715 is an abundant number, since it is smaller than the sum of its proper divisors (19324203765).

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

18281012715 is an frugal number, since it uses more digits than its factorization.

18281012715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79645 (or 79624 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 36.

The spelling of 18281012715 in words is "eighteen billion, two hundred eighty-one million, twelve thousand, seven hundred fifteen".