18720454402739 has 2 divisors, whose sum is σ = 18720454402740. Its totient is φ = 18720454402738.

The previous prime is 18720454402711. The next prime is 18720454402757. The reversal of 18720454402739 is 93720445402781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18720454402739 - 2²⁸ = 18720185967283 is a prime.

It is not a weakly prime, because it can be changed into another prime (18720454402759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9360227201369 + 9360227201370.

It is an arithmetic number, because the mean of its divisors is an integer number (9360227201370).

Almost surely, 2^{18720454402739} is an apocalyptic number.

18720454402739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18720454402739 is an equidigital number, since it uses as much as digits as its factorization.

18720454402739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 18720454402739 in words is "eighteen trillion, seven hundred twenty billion, four hundred fifty-four million, four hundred two thousand, seven hundred thirty-nine".