18320622081 has 16 divisors (see below), whose sum is σ = 25886165760. Its totient is φ = 11504958080.

The previous prime is 18320622077. The next prime is 18320622083. The reversal of 18320622081 is 18022602381.

It is a cyclic number.

It is not a de Polignac number, because 18320622081 - 2² = 18320622077 is a prime.

It is a super-2 number, since 2×18320622081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18320622083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2564505 + ... + 2571638.

It is an arithmetic number, because the mean of its divisors is an integer number (1617885360).

Almost surely, 2^18320622081 is an apocalyptic number.

It is an amenable number.

18320622081 is a deficient number, since it is larger than the sum of its proper divisors (7565543679).

18320622081 is a wasteful number, since it uses less digits than its factorization.

18320622081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136216.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 18320622081 in words is "eighteen billion, three hundred twenty million, six hundred twenty-two thousand, eighty-one".