19445893429 has 4 divisors (see below), whose sum is σ = 19523367360. Its totient is φ = 19368419500.

The previous prime is 19445893399. The next prime is 19445893451. The reversal of 19445893429 is 92439854491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92439854491 = 188869 ⋅489439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19445893429 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19445896429) 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, 38736589 + ... + 38737090.

It is an arithmetic number, because the mean of its divisors is an integer number (4880841840).

Almost surely, 2^19445893429 is an apocalyptic number.

It is an amenable number.

19445893429 is a deficient number, since it is larger than the sum of its proper divisors (77473931).

19445893429 is an equidigital number, since it uses as much as digits as its factorization.

19445893429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77473930.

The product of its digits is 11197440, while the sum is 58.

The spelling of 19445893429 in words is "nineteen billion, four hundred forty-five million, eight hundred ninety-three thousand, four hundred twenty-nine".