20967605 has 16 divisors (see below), whose sum is σ = 26901504. Its totient is φ = 15649920.

The previous prime is 20967589. The next prime is 20967619. The reversal of 20967605 is 50676902.

It is not a de Polignac number, because 20967605 - 2⁴ = 20967589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2492 + ... + 6938.

It is an arithmetic number, because the mean of its divisors is an integer number (1681344).

Almost surely, 2^20967605 is an apocalyptic number.

It is an amenable number.

20967605 is a deficient number, since it is larger than the sum of its proper divisors (5933899).

20967605 is a wasteful number, since it uses less digits than its factorization.

20967605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 20967605 is about 4579.0397464971. The cubic root of 20967605 is about 275.7504789945.

The spelling of 20967605 in words is "twenty million, nine hundred sixty-seven thousand, six hundred five".