18022487641 has 2 divisors, whose sum is σ = 18022487642. Its totient is φ = 18022487640.

The previous prime is 18022487611. The next prime is 18022487653. The reversal of 18022487641 is 14678422081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16511222016 + 1511265625 = 128496^2 + 38875^2 .

It is a cyclic number.

It is not a de Polignac number, because 18022487641 - 2⁹ = 18022487129 is a prime.

It is not a weakly prime, because it can be changed into another prime (18022487611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9011243820 + 9011243821.

It is an arithmetic number, because the mean of its divisors is an integer number (9011243821).

Almost surely, 2^18022487641 is an apocalyptic number.

It is an amenable number.

18022487641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18022487641 is an equidigital number, since it uses as much as digits as its factorization.

18022487641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 18022487641 in words is "eighteen billion, twenty-two million, four hundred eighty-seven thousand, six hundred forty-one".