20960643 has 16 divisors (see below), whose sum is σ = 32282496. Its totient is φ = 11955840.

The previous prime is 20960627. The next prime is 20960669. The reversal of 20960643 is 34606902.

It is not a de Polignac number, because 20960643 - 2⁴ = 20960627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20960643.

It is not an unprimeable number, because it can be changed into a prime (20960623) 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, 18121 + ... + 19242.

It is an arithmetic number, because the mean of its divisors is an integer number (2017656).

Almost surely, 2^20960643 is an apocalyptic number.

20960643 is a deficient number, since it is larger than the sum of its proper divisors (11321853).

20960643 is a wasteful number, since it uses less digits than its factorization.

20960643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37394.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20960643 is about 4578.2794803288. The cubic root of 20960643 is about 275.7199559193.

The spelling of 20960643 in words is "twenty million, nine hundred sixty thousand, six hundred forty-three".