18301322691 has 12 divisors (see below), whose sum is σ = 27149710432. Its totient is φ = 11871128016.

The previous prime is 18301322659. The next prime is 18301322713. The reversal of 18301322691 is 19622310381.

It is not a de Polignac number, because 18301322691 - 2⁵ = 18301322659 is a prime.

It is a super-2 number, since 2×18301322691² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18301322791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27479131 + ... + 27479796.

Almost surely, 2^18301322691 is an apocalyptic number.

18301322691 is a deficient number, since it is larger than the sum of its proper divisors (8848387741).

18301322691 is a wasteful number, since it uses less digits than its factorization.

18301322691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54958970 (or 54958967 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 18301322691 in words is "eighteen billion, three hundred one million, three hundred twenty-two thousand, six hundred ninety-one".