18009337916 has 48 divisors (see below), whose sum is σ = 33729696000. Its totient is φ = 8393290752.

The previous prime is 18009337909. The next prime is 18009337961. The reversal of 18009337916 is 61973390081.

It is a happy number.

It is a Smith number, since the sum of its digits (47) 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 15 ways as a sum of consecutive naturals, for example, 1771175 + ... + 1781313.

It is an arithmetic number, because the mean of its divisors is an integer number (702702000).

Almost surely, 2^18009337916 is an apocalyptic number.

It is an amenable number.

18009337916 is a deficient number, since it is larger than the sum of its proper divisors (15720358084).

18009337916 is a wasteful number, since it uses less digits than its factorization.

18009337916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10658 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 18009337916 in words is "eighteen billion, nine million, three hundred thirty-seven thousand, nine hundred sixteen".