18653003729 has 2 divisors, whose sum is σ = 18653003730. Its totient is φ = 18653003728.

The previous prime is 18653003651. The next prime is 18653003753. The reversal of 18653003729 is 92730035681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9599100625 + 9053903104 = 97975^2 + 95152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18653003729 is a prime.

It is a super-2 number, since 2×18653003729² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18653003729.

It is not a weakly prime, because it can be changed into another prime (18653003329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9326501864 + 9326501865.

It is an arithmetic number, because the mean of its divisors is an integer number (9326501865).

Almost surely, 2^18653003729 is an apocalyptic number.

It is an amenable number.

18653003729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18653003729 is an equidigital number, since it uses as much as digits as its factorization.

18653003729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 18653003729 in words is "eighteen billion, six hundred fifty-three million, three thousand, seven hundred twenty-nine".