21344169 has 16 divisors (see below), whose sum is σ = 35481600. Its totient is φ = 11087760.

The previous prime is 21344159. The next prime is 21344173. The reversal of 21344169 is 96144312.

It is not a de Polignac number, because 21344169 - 2¹² = 21340073 is a prime.

It is a super-2 number, since 2×21344169² = 911147100601122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21344119) 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, 45969 + ... + 46430.

It is an arithmetic number, because the mean of its divisors is an integer number (2217600).

Almost surely, 2^21344169 is an apocalyptic number.

It is an amenable number.

21344169 is a deficient number, since it is larger than the sum of its proper divisors (14137431).

21344169 is a wasteful number, since it uses less digits than its factorization.

21344169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92420.

The product of its digits is 5184, while the sum is 30.

The square root of 21344169 is about 4619.9749999324. The cubic root of 21344169 is about 277.3914582402.

The spelling of 21344169 in words is "twenty-one million, three hundred forty-four thousand, one hundred sixty-nine".