21160707 has 16 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 13662432.

The previous prime is 21160679. The next prime is 21160709. The reversal of 21160707 is 70706112.

It is not a de Polignac number, because 21160707 - 2¹⁰ = 21159683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21160709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41818 + ... + 42320.

It is an arithmetic number, because the mean of its divisors is an integer number (1819440).

Almost surely, 2^21160707 is an apocalyptic number.

21160707 is a deficient number, since it is larger than the sum of its proper divisors (7950333).

21160707 is a wasteful number, since it uses less digits than its factorization.

21160707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 21160707 is about 4600.0768471842. The cubic root of 21160707 is about 276.5944052502.

Adding to 21160707 its reverse (70706112), we get a palindrome (91866819).

The spelling of 21160707 in words is "twenty-one million, one hundred sixty thousand, seven hundred seven".