18281568382 has 48 divisors (see below), whose sum is σ = 34884218880. Its totient is φ = 7032476880.

The previous prime is 18281568359. The next prime is 18281568407. The reversal of 18281568382 is 28386518281.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65523 + ... + 202129.

It is an arithmetic number, because the mean of its divisors is an integer number (726754560).

Almost surely, 2^18281568382 is an apocalyptic number.

18281568382 is a deficient number, since it is larger than the sum of its proper divisors (16602650498).

18281568382 is a wasteful number, since it uses less digits than its factorization.

18281568382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136717 (or 136706 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 52.

It can be divided in two parts, 18 and 281568382, that added together give a square (281568400 = 16780²).

The spelling of 18281568382 in words is "eighteen billion, two hundred eighty-one million, five hundred sixty-eight thousand, three hundred eighty-two".