18301427321 has 2 divisors, whose sum is σ = 18301427322. Its totient is φ = 18301427320.

The previous prime is 18301427317. The next prime is 18301427381. The reversal of 18301427321 is 12372410381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12218207296 + 6083220025 = 110536^2 + 77995^2 .

It is a cyclic number.

It is not a de Polignac number, because 18301427321 - 2² = 18301427317 is a prime.

It is not a weakly prime, because it can be changed into another prime (18301427381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9150713660 + 9150713661.

It is an arithmetic number, because the mean of its divisors is an integer number (9150713661).

Almost surely, 2^18301427321 is an apocalyptic number.

It is an amenable number.

18301427321 is a deficient number, since it is larger than the sum of its proper divisors (1).

18301427321 is an equidigital number, since it uses as much as digits as its factorization.

18301427321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 18301427321 in words is "eighteen billion, three hundred one million, four hundred twenty-seven thousand, three hundred twenty-one".