19421669 has 8 divisors (see below), whose sum is σ = 20062080. Its totient is φ = 18790816.

The previous prime is 19421653. The next prime is 19421671. The reversal of 19421669 is 96612491.

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 19421669 - 2⁴ = 19421653 is a prime.

It is a super-2 number, since 2×19421669² = 754402453491122, which 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 (19421569) 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, 1862 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (2507760).

Almost surely, 2^19421669 is an apocalyptic number.

It is an amenable number.

19421669 is a deficient number, since it is larger than the sum of its proper divisors (640411).

19421669 is an equidigital number, since it uses as much as digits as its factorization.

19421669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779.

The product of its digits is 23328, while the sum is 38.

The square root of 19421669 is about 4407.0022691167. The cubic root of 19421669 is about 268.7997431631.

The spelling of 19421669 in words is "nineteen million, four hundred twenty-one thousand, six hundred sixty-nine".