19640896929 has 20 divisors (see below), whose sum is σ = 29377481584. Its totient is φ = 13077251064.

The previous prime is 19640896927. The next prime is 19640896939. The reversal of 19640896929 is 92969804691.

It is not a de Polignac number, because 19640896929 - 2¹ = 19640896927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19640896927) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 90307 + ... + 217800.

Almost surely, 2^19640896929 is an apocalyptic number.

It is an amenable number.

19640896929 is a deficient number, since it is larger than the sum of its proper divisors (9736584655).

19640896929 is an equidigital number, since it uses as much as digits as its factorization.

19640896929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308906 (or 308897 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 19640896929 in words is "nineteen billion, six hundred forty million, eight hundred ninety-six thousand, nine hundred twenty-nine".