19739345697 has 24 divisors (see below), whose sum is σ = 30447056640. Its totient is φ = 12295916640.

The previous prime is 19739345657. The next prime is 19739345707. The reversal of 19739345697 is 79654393791.

19739345697 is a `hidden beast` number, since 1 + 9 + 7 + 3 + 93 + 456 + 97 = 666.

It is not a de Polignac number, because 19739345697 - 2⁸ = 19739345441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19739345617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1211743 + ... + 1227924.

It is an arithmetic number, because the mean of its divisors is an integer number (1268627360).

Almost surely, 2^19739345697 is an apocalyptic number.

It is an amenable number.

19739345697 is a deficient number, since it is larger than the sum of its proper divisors (10707710943).

19739345697 is a wasteful number, since it uses less digits than its factorization.

19739345697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439733 (or 2439730 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 63.

The spelling of 19739345697 in words is "nineteen billion, seven hundred thirty-nine million, three hundred forty-five thousand, six hundred ninety-seven".