17969421 has 16 divisors (see below), whose sum is σ = 25318400. Its totient is φ = 11305008.

The previous prime is 17969389. The next prime is 17969423. The reversal of 17969421 is 12496971.

It is not a de Polignac number, because 17969421 - 2⁵ = 17969389 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 17969421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17969423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20490 + ... + 21348.

It is an arithmetic number, because the mean of its divisors is an integer number (1582400).

Almost surely, 2^17969421 is an apocalyptic number.

It is an amenable number.

17969421 is a deficient number, since it is larger than the sum of its proper divisors (7348979).

17969421 is a wasteful number, since it uses less digits than its factorization.

17969421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its digits is 27216, while the sum is 39.

The square root of 17969421 is about 4239.0353855565. The cubic root of 17969421 is about 261.9256485407.

The spelling of 17969421 in words is "seventeen million, nine hundred sixty-nine thousand, four hundred twenty-one".