18268326940 has 24 divisors (see below), whose sum is σ = 39013717680. Its totient is φ = 7183477248.

The previous prime is 18268326919. The next prime is 18268326941. The reversal of 18268326940 is 4962386281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268326941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7739637 + ... + 7741996.

It is an arithmetic number, because the mean of its divisors is an integer number (1625571570).

Almost surely, 2^18268326940 is an apocalyptic number.

18268326940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18268326940 is an abundant number, since it is smaller than the sum of its proper divisors (20745390740).

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

18268326940 is a wasteful number, since it uses less digits than its factorization.

18268326940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15481701 (or 15481699 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 18268326940 in words is "eighteen billion, two hundred sixty-eight million, three hundred twenty-six thousand, nine hundred forty".