20944819 has 4 divisors (see below), whose sum is σ = 23936944. Its totient is φ = 17952696.

The previous prime is 20944817. The next prime is 20944831. The reversal of 20944819 is 91844902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20944819 - 2¹ = 20944817 is a prime.

It is a super-2 number, since 2×20944819² = 877370885885522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20944811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496052 + ... + 1496065.

It is an arithmetic number, because the mean of its divisors is an integer number (5984236).

Almost surely, 2^20944819 is an apocalyptic number.

20944819 is a deficient number, since it is larger than the sum of its proper divisors (2992125).

20944819 is an equidigital number, since it uses as much as digits as its factorization.

20944819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992124.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20944819 is about 4576.5509939254. The cubic root of 20944819 is about 275.6505545659.

The spelling of 20944819 in words is "twenty million, nine hundred forty-four thousand, eight hundred nineteen".