21966294 has 16 divisors (see below), whose sum is σ = 50208768. Its totient is φ = 6276072.

The previous prime is 21966293. The next prime is 21966313. The reversal of 21966294 is 49266912.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21966293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261462 + ... + 261545.

It is an arithmetic number, because the mean of its divisors is an integer number (3138048).

Almost surely, 2^21966294 is an apocalyptic number.

21966294 is an abundant number, since it is smaller than the sum of its proper divisors (28242474).

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

21966294 is a wasteful number, since it uses less digits than its factorization.

21966294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523019.

The product of its digits is 46656, while the sum is 39.

The square root of 21966294 is about 4686.8213108673. The cubic root of 21966294 is about 280.0607606234.

The spelling of 21966294 in words is "twenty-one million, nine hundred sixty-six thousand, two hundred ninety-four".