18733232641 has 2 divisors, whose sum is σ = 18733232642. Its totient is φ = 18733232640.

The previous prime is 18733232611. The next prime is 18733232653. The reversal of 18733232641 is 14623233781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18583415041 + 149817600 = 136321^2 + 12240^2 .

It is a cyclic number.

It is not a de Polignac number, because 18733232641 - 2¹⁹ = 18732708353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18733232594 and 18733232603.

It is not a weakly prime, because it can be changed into another prime (18733232611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9366616320 + 9366616321.

It is an arithmetic number, because the mean of its divisors is an integer number (9366616321).

Almost surely, 2^18733232641 is an apocalyptic number.

It is an amenable number.

18733232641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18733232641 is an equidigital number, since it uses as much as digits as its factorization.

18733232641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The spelling of 18733232641 in words is "eighteen billion, seven hundred thirty-three million, two hundred thirty-two thousand, six hundred forty-one".