19969437129 has 8 divisors (see below), whose sum is σ = 27345535680. Its totient is φ = 12953148336.

The previous prime is 19969437113. The next prime is 19969437139. The reversal of 19969437129 is 92173496991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19969437129 - 2⁴ = 19969437113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19969437139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89952309 + ... + 89952530.

It is an arithmetic number, because the mean of its divisors is an integer number (3418191960).

Almost surely, 2^19969437129 is an apocalyptic number.

It is an amenable number.

19969437129 is a deficient number, since it is larger than the sum of its proper divisors (7376098551).

19969437129 is a wasteful number, since it uses less digits than its factorization.

19969437129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179904879.

The product of its digits is 6613488, while the sum is 60.

The spelling of 19969437129 in words is "nineteen billion, nine hundred sixty-nine million, four hundred thirty-seven thousand, one hundred twenty-nine".