20444691 has 16 divisors (see below), whose sum is σ = 28062720. Its totient is φ = 13231680.

The previous prime is 20444689. The next prime is 20444707. The reversal of 20444691 is 19644402.

It is not a de Polignac number, because 20444691 - 2¹ = 20444689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20444191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43926 + ... + 44388.

It is an arithmetic number, because the mean of its divisors is an integer number (1753920).

Almost surely, 2^20444691 is an apocalyptic number.

20444691 is a deficient number, since it is larger than the sum of its proper divisors (7618029).

20444691 is a wasteful number, since it uses less digits than its factorization.

20444691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20444691 is about 4521.5805864764. The cubic root of 20444691 is about 273.4388278423.

The spelling of 20444691 in words is "twenty million, four hundred forty-four thousand, six hundred ninety-one".