21967299 has 12 divisors (see below), whose sum is σ = 32058936. Its totient is φ = 14493312.

The previous prime is 21967271. The next prime is 21967303. The reversal of 21967299 is 99276912.

It is not a de Polignac number, because 21967299 - 2⁷ = 21967171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21967229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11709 + ... + 13454.

It is an arithmetic number, because the mean of its divisors is an integer number (2671578).

Almost surely, 2^21967299 is an apocalyptic number.

21967299 is a deficient number, since it is larger than the sum of its proper divisors (10091637).

21967299 is a wasteful number, since it uses less digits than its factorization.

21967299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25266 (or 25263 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 21967299 is about 4686.9285251644. The cubic root of 21967299 is about 280.0650316635.

The spelling of 21967299 in words is "twenty-one million, nine hundred sixty-seven thousand, two hundred ninety-nine".