21337707 has 8 divisors (see below), whose sum is σ = 29431440. Its totient is φ = 13734560.

The previous prime is 21337643. The next prime is 21337717. The reversal of 21337707 is 70773312.

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 21337707 - 2⁶ = 21337643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21337717) 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, 122544 + ... + 122717.

It is an arithmetic number, because the mean of its divisors is an integer number (3678930).

Almost surely, 2^21337707 is an apocalyptic number.

21337707 is a deficient number, since it is larger than the sum of its proper divisors (8093733).

21337707 is a wasteful number, since it uses less digits than its factorization.

21337707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245293.

The product of its (nonzero) digits is 6174, while the sum is 30.

The square root of 21337707 is about 4619.2755925578. The cubic root of 21337707 is about 277.3634617645.

The spelling of 21337707 in words is "twenty-one million, three hundred thirty-seven thousand, seven hundred seven".