19439622929 has 2 divisors, whose sum is σ = 19439622930. Its totient is φ = 19439622928.

The previous prime is 19439622911. The next prime is 19439622949. The reversal of 19439622929 is 92922693491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14007195904 + 5432427025 = 118352^2 + 73705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19439622929 is a prime.

It is not a weakly prime, because it can be changed into another prime (19439622949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719811464 + 9719811465.

It is an arithmetic number, because the mean of its divisors is an integer number (9719811465).

Almost surely, 2^19439622929 is an apocalyptic number.

It is an amenable number.

19439622929 is a deficient number, since it is larger than the sum of its proper divisors (1).

19439622929 is an equidigital number, since it uses as much as digits as its factorization.

19439622929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The spelling of 19439622929 in words is "nineteen billion, four hundred thirty-nine million, six hundred twenty-two thousand, nine hundred twenty-nine".