21874267 has 2 divisors, whose sum is σ = 21874268. Its totient is φ = 21874266.

The previous prime is 21874261. The next prime is 21874271. The reversal of 21874267 is 76247812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21874267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21874261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10937133 + 10937134.

It is an arithmetic number, because the mean of its divisors is an integer number (10937134).

Almost surely, 2^21874267 is an apocalyptic number.

21874267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21874267 is an equidigital number, since it uses as much as digits as its factorization.

21874267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 21874267 is about 4676.9933718148. The cubic root of 21874267 is about 279.6691116798.

The spelling of 21874267 in words is "twenty-one million, eight hundred seventy-four thousand, two hundred sixty-seven".