20944443 has 8 divisors (see below), whose sum is σ = 30074128. Its totient is φ = 12888864.

The previous prime is 20944393. The next prime is 20944453. The reversal of 20944443 is 34444902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20944443 - 2⁶ = 20944379 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 20944443.

It is not an unprimeable number, because it can be changed into a prime (20944453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268480 + ... + 268557.

It is an arithmetic number, because the mean of its divisors is an integer number (3759266).

Almost surely, 2^20944443 is an apocalyptic number.

20944443 is a deficient number, since it is larger than the sum of its proper divisors (9129685).

20944443 is a wasteful number, since it uses less digits than its factorization.

20944443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537053.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20944443 is about 4576.5099147713. The cubic root of 20944443 is about 275.6489050692.

The spelling of 20944443 in words is "twenty million, nine hundred forty-four thousand, four hundred forty-three".