19421994469 has 8 divisors (see below), whose sum is σ = 19689892128. Its totient is φ = 19155696720.

The previous prime is 19421994457. The next prime is 19421994479. The reversal of 19421994469 is 96449912491.

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

It is a cyclic number.

It is not a de Polignac number, because 19421994469 - 2⁹ = 19421993957 is a prime.

It is a super-2 number, since 2×19421994469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421994409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375522 + ... + 424099.

It is an arithmetic number, because the mean of its divisors is an integer number (2461236516).

Almost surely, 2^19421994469 is an apocalyptic number.

It is an amenable number.

19421994469 is a deficient number, since it is larger than the sum of its proper divisors (267897659).

19421994469 is a wasteful number, since it uses less digits than its factorization.

19421994469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799955.

The product of its digits is 5038848, while the sum is 58.

The spelling of 19421994469 in words is "nineteen billion, four hundred twenty-one million, nine hundred ninety-four thousand, four hundred sixty-nine".