20633717 has 12 divisors (see below), whose sum is σ = 22627584. Its totient is φ = 18804240.

The previous prime is 20633663. The next prime is 20633729. The reversal of 20633717 is 71733602.

It is not a de Polignac number, because 20633717 - 2⁶ = 20633653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20633717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13292 + ... + 14762.

It is an arithmetic number, because the mean of its divisors is an integer number (1885632).

Almost surely, 2^20633717 is an apocalyptic number.

It is an amenable number.

20633717 is a deficient number, since it is larger than the sum of its proper divisors (1993867).

20633717 is a wasteful number, since it uses less digits than its factorization.

20633717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 20633717 is about 4542.4351398782. The cubic root of 20633717 is about 274.2789573789.

The spelling of 20633717 in words is "twenty million, six hundred thirty-three thousand, seven hundred seventeen".