20943306 has 16 divisors (see below), whose sum is σ = 46540800. Its totient is φ = 6981084.

The previous prime is 20943287. The next prime is 20943319. The reversal of 20943306 is 60334902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20943306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193866 + ... + 193973.

It is an arithmetic number, because the mean of its divisors is an integer number (2908800).

Almost surely, 2^20943306 is an apocalyptic number.

20943306 is an abundant number, since it is smaller than the sum of its proper divisors (25597494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20943306 is a wasteful number, since it uses less digits than its factorization.

20943306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387850 (or 387844 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20943306 is about 4576.3856917878. The cubic root of 20943306 is about 275.6439169764.

The spelling of 20943306 in words is "twenty million, nine hundred forty-three thousand, three hundred six".