19634455129 has 3 divisors (see below), whose sum is σ = 19634595253. Its totient is φ = 19634315006.

The previous prime is 19634455097. The next prime is 19634455157. The reversal of 19634455129 is 92155443691.

The square root of 19634455129 is 140123.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92155443691 = 102101 ⋅902591.

It is not a de Polignac number, because 19634455129 - 2⁵ = 19634455097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19634455189) 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 2 ways as a sum of consecutive naturals, for example, 70062 + ... + 210184.

Almost surely, 2^19634455129 is an apocalyptic number.

19634455129 is the 140123-rd square number.

19634455129 is the 70062-nd centered octagonal number.

It is an amenable number.

19634455129 is a deficient number, since it is larger than the sum of its proper divisors (140124).

19634455129 is an frugal number, since it uses more digits than its factorization.

19634455129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280246 (or 140123 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

Multiplying 19634455129 by its sum of digits (49), we get a square (962088301321 = 980861²).

The spelling of 19634455129 in words is "nineteen billion, six hundred thirty-four million, four hundred fifty-five thousand, one hundred twenty-nine".