21969414 has 32 divisors (see below), whose sum is σ = 50508000. Its totient is φ = 7070112.

The previous prime is 21969407. The next prime is 21969449. The reversal of 21969414 is 41496912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5449 + ... + 8580.

It is an arithmetic number, because the mean of its divisors is an integer number (1578375).

Almost surely, 2^21969414 is an apocalyptic number.

21969414 is an abundant number, since it is smaller than the sum of its proper divisors (28538586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21969414 is a wasteful number, since it uses less digits than its factorization.

21969414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14069 (or 14063 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 21969414 is about 4687.1541472412. The cubic root of 21969414 is about 280.0740195464.

The spelling of 21969414 in words is "twenty-one million, nine hundred sixty-nine thousand, four hundred fourteen".