19674720323 has 2 divisors, whose sum is σ = 19674720324. Its totient is φ = 19674720322.

The previous prime is 19674720319. The next prime is 19674720361. The reversal of 19674720323 is 32302747691.

It is a weak prime.

It is an emirp because it is prime and its reverse (32302747691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19674720323 - 2² = 19674720319 is a prime.

It is not a weakly prime, because it can be changed into another prime (19674722323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9837360161 + 9837360162.

It is an arithmetic number, because the mean of its divisors is an integer number (9837360162).

Almost surely, 2^19674720323 is an apocalyptic number.

19674720323 is a deficient number, since it is larger than the sum of its proper divisors (1).

19674720323 is an equidigital number, since it uses as much as digits as its factorization.

19674720323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 19674720323 in words is "nineteen billion, six hundred seventy-four million, seven hundred twenty thousand, three hundred twenty-three".