20744219 has 8 divisors (see below), whose sum is σ = 21953040. Its totient is φ = 19547136.

The previous prime is 20744173. The next prime is 20744231. The reversal of 20744219 is 91244702.

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 20744219 - 2¹⁶ = 20678683 is a prime.

It is a super-2 number, since 2×20744219² = 860645243839922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20744191 and 20744200.

It is not an unprimeable number, because it can be changed into a prime (20744279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (2744130).

Almost surely, 2^20744219 is an apocalyptic number.

20744219 is a deficient number, since it is larger than the sum of its proper divisors (1208821).

20744219 is a wasteful number, since it uses less digits than its factorization.

20744219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20744219 is about 4554.5821981824. The cubic root of 20744219 is about 274.7677112822.

The spelling of 20744219 in words is "twenty million, seven hundred forty-four thousand, two hundred nineteen".