20894144 has 28 divisors (see below), whose sum is σ = 41781984. Its totient is φ = 10366464.

The previous prime is 20894131. The next prime is 20894149. The reversal of 20894144 is 44149802.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20894144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7577 + ... + 9959.

Almost surely, 2^20894144 is an apocalyptic number.

It is an amenable number.

20894144 is a deficient number, since it is larger than the sum of its proper divisors (20887840).

20894144 is a wasteful number, since it uses less digits than its factorization.

20894144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532 (or 2522 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20894144 is about 4571.0112666674. The cubic root of 20894144 is about 275.4280672057.

The spelling of 20894144 in words is "twenty million, eight hundred ninety-four thousand, one hundred forty-four".