21446422 has 8 divisors (see below), whose sum is σ = 32917896. Its totient is φ = 10473792.

The previous prime is 21446417. The next prime is 21446431. The reversal of 21446422 is 22464412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124603 + ... + 124774.

It is an arithmetic number, because the mean of its divisors is an integer number (4114737).

Almost surely, 2^21446422 is an apocalyptic number.

21446422 is a deficient number, since it is larger than the sum of its proper divisors (11471474).

21446422 is a wasteful number, since it uses less digits than its factorization.

21446422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249422.

The product of its digits is 3072, while the sum is 25.

The square root of 21446422 is about 4631.0281795731. The cubic root of 21446422 is about 277.8337169593.

The spelling of 21446422 in words is "twenty-one million, four hundred forty-six thousand, four hundred twenty-two".