21914414 has 4 divisors (see below), whose sum is σ = 32871624. Its totient is φ = 10957206.

The previous prime is 21914413. The next prime is 21914419. The reversal of 21914414 is 41441912.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914413) 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 as a sum of consecutive naturals, namely, 5478602 + ... + 5478605.

It is an arithmetic number, because the mean of its divisors is an integer number (8217906).

Almost surely, 2^21914414 is an apocalyptic number.

21914414 is a deficient number, since it is larger than the sum of its proper divisors (10957210).

21914414 is a wasteful number, since it uses less digits than its factorization.

21914414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957209.

The product of its digits is 1152, while the sum is 26.

The square root of 21914414 is about 4681.2833710426. The cubic root of 21914414 is about 279.8401042862.

The spelling of 21914414 in words is "twenty-one million, nine hundred fourteen thousand, four hundred fourteen".