21614469 has 4 divisors (see below), whose sum is σ = 28819296. Its totient is φ = 14409644.

The previous prime is 21614441. The next prime is 21614491. The reversal of 21614469 is 96441612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21614469 - 2⁸ = 21614213 is a prime.

It is a super-2 number, since 2×21614469² = 934370540303922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614569) 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, 3602409 + ... + 3602414.

It is an arithmetic number, because the mean of its divisors is an integer number (7204824).

Almost surely, 2^21614469 is an apocalyptic number.

It is an amenable number.

21614469 is a deficient number, since it is larger than the sum of its proper divisors (7204827).

21614469 is an equidigital number, since it uses as much as digits as its factorization.

21614469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204826.

The product of its digits is 10368, while the sum is 33.

The square root of 21614469 is about 4649.1363714135. The cubic root of 21614469 is about 278.5575005340.

The spelling of 21614469 in words is "twenty-one million, six hundred fourteen thousand, four hundred sixty-nine".