21796107 has 4 divisors (see below), whose sum is σ = 29061480. Its totient is φ = 14530736.

The previous prime is 21796067. The next prime is 21796129. The reversal of 21796107 is 70169712.

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 21796107 - 2²² = 17601803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21796207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3632682 + ... + 3632687.

It is an arithmetic number, because the mean of its divisors is an integer number (7265370).

Almost surely, 2^21796107 is an apocalyptic number.

21796107 is a deficient number, since it is larger than the sum of its proper divisors (7265373).

21796107 is an equidigital number, since it uses as much as digits as its factorization.

21796107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7265372.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 21796107 is about 4668.6300988620. The cubic root of 21796107 is about 279.3356144148.

The spelling of 21796107 in words is "twenty-one million, seven hundred ninety-six thousand, one hundred seven".