19722419 has 4 divisors (see below), whose sum is σ = 19744320. Its totient is φ = 19700520.

The previous prime is 19722403. The next prime is 19722421. The reversal of 19722419 is 91422791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19722419 - 2⁴ = 19722403 is a prime.

It is a super-2 number, since 2×19722419² = 777947622423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19722449) 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 3 ways as a sum of consecutive naturals, for example, 9539 + ... + 11420.

It is an arithmetic number, because the mean of its divisors is an integer number (4936080).

Almost surely, 2^19722419 is an apocalyptic number.

19722419 is a deficient number, since it is larger than the sum of its proper divisors (21901).

19722419 is an equidigital number, since it uses as much as digits as its factorization.

19722419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21900.

The product of its digits is 9072, while the sum is 35.

The square root of 19722419 is about 4440.9930195847. The cubic root of 19722419 is about 270.1801221515.

The spelling of 19722419 in words is "nineteen million, seven hundred twenty-two thousand, four hundred nineteen".