21335907 has 8 divisors (see below), whose sum is σ = 28714176. Its totient is φ = 14090792.

The previous prime is 21335893. The next prime is 21335911. The reversal of 21335907 is 70953312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21335907 - 2⁴ = 21335891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21335107) 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 7 ways as a sum of consecutive naturals, for example, 32913 + ... + 33554.

It is an arithmetic number, because the mean of its divisors is an integer number (3589272).

Almost surely, 2^21335907 is an apocalyptic number.

21335907 is a deficient number, since it is larger than the sum of its proper divisors (7378269).

21335907 is a wasteful number, since it uses less digits than its factorization.

21335907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66577.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 21335907 is about 4619.0807527039. The cubic root of 21335907 is about 277.3556622968.

The spelling of 21335907 in words is "twenty-one million, three hundred thirty-five thousand, nine hundred seven".