18340687916 has 24 divisors (see below), whose sum is σ = 34698604080. Its totient is φ = 8452890432.

The previous prime is 18340687913. The next prime is 18340687943. The reversal of 18340687916 is 61978604381.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18340687913) 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, 3258335 + ... + 3263958.

It is an arithmetic number, because the mean of its divisors is an integer number (1445775170).

Almost surely, 2^18340687916 is an apocalyptic number.

It is an amenable number.

18340687916 is a deficient number, since it is larger than the sum of its proper divisors (16357916164).

18340687916 is a wasteful number, since it uses less digits than its factorization.

18340687916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6522353 (or 6522351 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 18340687916 in words is "eighteen billion, three hundred forty million, six hundred eighty-seven thousand, nine hundred sixteen".