21796867 has 2 divisors, whose sum is σ = 21796868. Its totient is φ = 21796866.

The previous prime is 21796843. The next prime is 21796877. The reversal of 21796867 is 76869712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21796867 - 2⁷ = 21796739 is a prime.

It is a super-2 number, since 2×21796867² = 950206822031378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21796807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10898433 + 10898434.

It is an arithmetic number, because the mean of its divisors is an integer number (10898434).

Almost surely, 2^21796867 is an apocalyptic number.

21796867 is a deficient number, since it is larger than the sum of its proper divisors (1).

21796867 is an equidigital number, since it uses as much as digits as its factorization.

21796867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 21796867 is about 4668.7114924784. The cubic root of 21796867 is about 279.3388610588.

The spelling of 21796867 in words is "twenty-one million, seven hundred ninety-six thousand, eight hundred sixty-seven".