20321944 has 16 divisors (see below), whose sum is σ = 40109400. Its totient is φ = 9626112.

The previous prime is 20321941. The next prime is 20321981. The reversal of 20321944 is 44912302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321941) 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 3 ways as a sum of consecutive naturals, for example, 66697 + ... + 67000.

Almost surely, 2^20321944 is an apocalyptic number.

It is an amenable number.

20321944 is a deficient number, since it is larger than the sum of its proper divisors (19787456).

20321944 is a wasteful number, since it uses less digits than its factorization.

20321944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133722 (or 133718 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20321944 is about 4507.9866903087. The cubic root of 20321944 is about 272.8904998111.

The spelling of 20321944 in words is "twenty million, three hundred twenty-one thousand, nine hundred forty-four".