20726844 has 24 divisors (see below), whose sum is σ = 48486480. Its totient is φ = 6891264.

The previous prime is 20726837. The next prime is 20726897. The reversal of 20726844 is 44862702.

It is a congruent number.

It is an unprimeable number.

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, 3202 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (2020270).

Almost surely, 2^20726844 is an apocalyptic number.

It is an amenable number.

20726844 is an abundant number, since it is smaller than the sum of its proper divisors (27759636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20726844 is a wasteful number, since it uses less digits than its factorization.

20726844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429 (or 4427 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 20726844 is about 4552.6743788679. The cubic root of 20726844 is about 274.6909762891.

The spelling of 20726844 in words is "twenty million, seven hundred twenty-six thousand, eight hundred forty-four".