18072101633 has 2 divisors, whose sum is σ = 18072101634. Its totient is φ = 18072101632.

The previous prime is 18072101629. The next prime is 18072101711. The reversal of 18072101633 is 33610127081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13963676224 + 4108425409 = 118168^2 + 64097^2 .

It is a cyclic number.

It is not a de Polignac number, because 18072101633 - 2² = 18072101629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18072101633.

It is not a weakly prime, because it can be changed into another prime (18072101833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036050816 + 9036050817.

It is an arithmetic number, because the mean of its divisors is an integer number (9036050817).

Almost surely, 2^18072101633 is an apocalyptic number.

It is an amenable number.

18072101633 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072101633 is an equidigital number, since it uses as much as digits as its factorization.

18072101633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 18072101633 in words is "eighteen billion, seventy-two million, one hundred one thousand, six hundred thirty-three".