20001944 has 32 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 9507360.

The previous prime is 20001937. The next prime is 20001959. The reversal of 20001944 is 44910002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13949 + ... + 15315.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2^20001944 is an apocalyptic number.

It is an amenable number.

20001944 is a deficient number, since it is larger than the sum of its proper divisors (19396456).

20001944 is a wasteful number, since it uses less digits than its factorization.

20001944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20001944 is about 4472.3532955257. The cubic root of 20001944 is about 271.4505560876.

Adding to 20001944 its reverse (44910002), we get a palindrome (64911946).

The spelling of 20001944 in words is "twenty million, one thousand, nine hundred forty-four".