20726444 has 6 divisors (see below), whose sum is σ = 36271284. Its totient is φ = 10363220.

The previous prime is 20726441. The next prime is 20726471. The reversal of 20726444 is 44462702.

It is not an unprimeable number, because it can be changed into a prime (20726441) 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 as a sum of consecutive naturals, namely, 2590802 + ... + 2590809.

It is an arithmetic number, because the mean of its divisors is an integer number (6045214).

Almost surely, 2^20726444 is an apocalyptic number.

It is an amenable number.

20726444 is a deficient number, since it is larger than the sum of its proper divisors (15544840).

20726444 is a wasteful number, since it uses less digits than its factorization.

20726444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181615 (or 5181613 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 20726444 is about 4552.6304484331. The cubic root of 20726444 is about 274.6892092232.

The spelling of 20726444 in words is "twenty million, seven hundred twenty-six thousand, four hundred forty-four".