20994268 has 6 divisors (see below), whose sum is σ = 36739976. Its totient is φ = 10497132.

The previous prime is 20994247. The next prime is 20994271. The reversal of 20994268 is 86249902.

It is a self number, because there is not a number n which added to its sum of digits gives 20994268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2624280 + ... + 2624287.

Almost surely, 2^20994268 is an apocalyptic number.

It is an amenable number.

20994268 is a deficient number, since it is larger than the sum of its proper divisors (15745708).

20994268 is a wasteful number, since it uses less digits than its factorization.

20994268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248571 (or 5248569 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 20994268 is about 4581.9502397996. The cubic root of 20994268 is about 275.8673135231.

The spelling of 20994268 in words is "twenty million, nine hundred ninety-four thousand, two hundred sixty-eight".