19672530749 has 2 divisors, whose sum is σ = 19672530750. Its totient is φ = 19672530748.

The previous prime is 19672530733. The next prime is 19672530791. The reversal of 19672530749 is 94703527691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12986197849 + 6686332900 = 113957^2 + 81770^2 .

It is a cyclic number.

It is not a de Polignac number, because 19672530749 - 2⁴ = 19672530733 is a prime.

It is a super-3 number, since 3×19672530749³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19672530749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19672532749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9836265374 + 9836265375.

It is an arithmetic number, because the mean of its divisors is an integer number (9836265375).

Almost surely, 2^19672530749 is an apocalyptic number.

It is an amenable number.

19672530749 is a deficient number, since it is larger than the sum of its proper divisors (1).

19672530749 is an equidigital number, since it uses as much as digits as its factorization.

19672530749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 19672530749 in words is "nineteen billion, six hundred seventy-two million, five hundred thirty thousand, seven hundred forty-nine".