21268707 has 8 divisors (see below), whose sum is σ = 28549200. Its totient is φ = 14083680.

The previous prime is 21268699. The next prime is 21268727. The reversal of 21268707 is 70786212.

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

It is not a de Polignac number, because 21268707 - 2³ = 21268699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21268727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23344 + ... + 24237.

It is an arithmetic number, because the mean of its divisors is an integer number (3568650).

Almost surely, 2^21268707 is an apocalyptic number.

21268707 is a deficient number, since it is larger than the sum of its proper divisors (7280493).

21268707 is a wasteful number, since it uses less digits than its factorization.

21268707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47733.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 21268707 is about 4611.8008413200. The cubic root of 21268707 is about 277.0641677336.

The spelling of 21268707 in words is "twenty-one million, two hundred sixty-eight thousand, seven hundred seven".