19489713297 has 32 divisors (see below), whose sum is σ = 27895836672. Its totient is φ = 12074730624.

The previous prime is 19489713283. The next prime is 19489713311. The reversal of 19489713297 is 79231798491.

It is an interprime number because it is at equal distance from previous prime (19489713283) and next prime (19489713311).

It is not a de Polignac number, because 19489713297 - 2⁸ = 19489713041 is a prime.

It is a super-2 number, since 2×19489713297² (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 19489713297.

It is not an unprimeable number, because it can be changed into a prime (19489713227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422358 + ... + 466224.

It is an arithmetic number, because the mean of its divisors is an integer number (871744896).

Almost surely, 2^19489713297 is an apocalyptic number.

It is an amenable number.

19489713297 is a deficient number, since it is larger than the sum of its proper divisors (8406123375).

19489713297 is a wasteful number, since it uses less digits than its factorization.

19489713297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44077.

The product of its digits is 6858432, while the sum is 60.

The spelling of 19489713297 in words is "nineteen billion, four hundred eighty-nine million, seven hundred thirteen thousand, two hundred ninety-seven".