19451695429 has 4 divisors (see below), whose sum is σ = 19453036140. Its totient is φ = 19450354720.

The previous prime is 19451695349. The next prime is 19451695499. The reversal of 19451695429 is 92459615491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92459615491 = 53 ⋅1744521047.

It can be written as a sum of positive squares in 2 ways, for example, as 8705263204 + 10746432225 = 93302^2 + 103665^2 .

It is a cyclic number.

It is not a de Polignac number, because 19451695429 - 2⁹ = 19451694917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19451695429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19451695499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648352 + ... + 677689.

It is an arithmetic number, because the mean of its divisors is an integer number (4863259035).

Almost surely, 2^19451695429 is an apocalyptic number.

It is an amenable number.

19451695429 is a deficient number, since it is larger than the sum of its proper divisors (1340711).

19451695429 is a wasteful number, since it uses less digits than its factorization.

19451695429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340710.

The product of its digits is 3499200, while the sum is 55.

The spelling of 19451695429 in words is "nineteen billion, four hundred fifty-one million, six hundred ninety-five thousand, four hundred twenty-nine".