18838668601 has 2 divisors, whose sum is σ = 18838668602. Its totient is φ = 18838668600.

The previous prime is 18838668593. The next prime is 18838668617. The reversal of 18838668601 is 10686683881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12851623225 + 5987045376 = 113365^2 + 77376^2 .

It is a cyclic number.

It is not a de Polignac number, because 18838668601 - 2³ = 18838668593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18838668691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9419334300 + 9419334301.

It is an arithmetic number, because the mean of its divisors is an integer number (9419334301).

Almost surely, 2^18838668601 is an apocalyptic number.

It is an amenable number.

18838668601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18838668601 is an equidigital number, since it uses as much as digits as its factorization.

18838668601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 18838668601 in words is "eighteen billion, eight hundred thirty-eight million, six hundred sixty-eight thousand, six hundred one".