20944969 has 8 divisors (see below), whose sum is σ = 22304160. Its totient is φ = 19599936.

The previous prime is 20944951. The next prime is 20944981. The reversal of 20944969 is 96944902.

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

It is a cyclic number.

It is not a de Polignac number, because 20944969 - 2¹⁹ = 20420681 is a prime.

It is a super-2 number, since 2×20944969² = 877383452821922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20944909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399 + ... + 6484.

It is an arithmetic number, because the mean of its divisors is an integer number (2788020).

Almost surely, 2^20944969 is an apocalyptic number.

It is an amenable number.

20944969 is a deficient number, since it is larger than the sum of its proper divisors (1359191).

20944969 is a wasteful number, since it uses less digits than its factorization.

20944969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 20944969 is about 4576.5673817830. The cubic root of 20944969 is about 275.6512126043.

The spelling of 20944969 in words is "twenty million, nine hundred forty-four thousand, nine hundred sixty-nine".