21967014 has 16 divisors (see below), whose sum is σ = 44536752. Its totient is φ = 7221888.

The previous prime is 21966961. The next prime is 21967019. The reversal of 21967014 is 41076912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21967019) 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, 24639 + ... + 25514.

It is an arithmetic number, because the mean of its divisors is an integer number (2783547).

Almost surely, 2^21967014 is an apocalyptic number.

21967014 is an abundant number, since it is smaller than the sum of its proper divisors (22569738).

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

21967014 is a wasteful number, since it uses less digits than its factorization.

21967014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50231.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 21967014 is about 4686.8981213592. The cubic root of 21967014 is about 280.0638204863.

The spelling of 21967014 in words is "twenty-one million, nine hundred sixty-seven thousand, fourteen".