21468914 has 4 divisors (see below), whose sum is σ = 32203374. Its totient is φ = 10734456.

The previous prime is 21468907. The next prime is 21468919. The reversal of 21468914 is 41986412.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 21464689 + 4225 = 4633^2 + 65^2 .

It is not an unprimeable number, because it can be changed into a prime (21468919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5367227 + ... + 5367230.

Almost surely, 2^21468914 is an apocalyptic number.

21468914 is a deficient number, since it is larger than the sum of its proper divisors (10734460).

21468914 is a wasteful number, since it uses less digits than its factorization.

21468914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10734459.

The product of its digits is 13824, while the sum is 35.

The square root of 21468914 is about 4633.4559456199. The cubic root of 21468914 is about 277.9308093425.

The spelling of 21468914 in words is "twenty-one million, four hundred sixty-eight thousand, nine hundred fourteen".