21446694 has 24 divisors (see below), whose sum is σ = 48189960. Its totient is φ = 7148736.

The previous prime is 21446693. The next prime is 21446701. The reversal of 21446694 is 49664412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21579 + ... + 22550.

It is an arithmetic number, because the mean of its divisors is an integer number (2007915).

Almost surely, 2^21446694 is an apocalyptic number.

21446694 is an abundant number, since it is smaller than the sum of its proper divisors (26743266).

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

21446694 is an equidigital number, since it uses as much as digits as its factorization.

21446694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44146 (or 44134 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 21446694 is about 4631.0575466085. The cubic root of 21446694 is about 277.8348915213.

The spelling of 21446694 in words is "twenty-one million, four hundred forty-six thousand, six hundred ninety-four".