21796967 has 4 divisors (see below), whose sum is σ = 22021776. Its totient is φ = 21572160.

The previous prime is 21796961. The next prime is 21796979. The reversal of 21796967 is 76969712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21796967 - 2⁶ = 21796903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112259 + ... + 112452.

It is an arithmetic number, because the mean of its divisors is an integer number (5505444).

Almost surely, 2^21796967 is an apocalyptic number.

21796967 is a deficient number, since it is larger than the sum of its proper divisors (224809).

21796967 is an equidigital number, since it uses as much as digits as its factorization.

21796967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224808.

The product of its digits is 285768, while the sum is 47.

The square root of 21796967 is about 4668.7222020591. The cubic root of 21796967 is about 279.3392882432.

The spelling of 21796967 in words is "twenty-one million, seven hundred ninety-six thousand, nine hundred sixty-seven".