21967293 has 16 divisors (see below), whose sum is σ = 30182400. Its totient is φ = 14205360.

The previous prime is 21967271. The next prime is 21967303. The reversal of 21967293 is 39276912.

It is not a de Polignac number, because 21967293 - 2⁵ = 21967261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21967243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13198 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (1886400).

Almost surely, 2^21967293 is an apocalyptic number.

It is an amenable number.

21967293 is a deficient number, since it is larger than the sum of its proper divisors (8215107).

21967293 is a wasteful number, since it uses less digits than its factorization.

21967293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712.

The product of its digits is 40824, while the sum is 39.

The square root of 21967293 is about 4686.9278850863. The cubic root of 21967293 is about 280.0650061652.

The spelling of 21967293 in words is "twenty-one million, nine hundred sixty-seven thousand, two hundred ninety-three".