20111444 has 12 divisors (see below), whose sum is σ = 36013824. Its totient is φ = 9821784.

The previous prime is 20111411. The next prime is 20111447. The reversal of 20111444 is 44411102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58292 + ... + 58635.

It is an arithmetic number, because the mean of its divisors is an integer number (3001152).

Almost surely, 2^20111444 is an apocalyptic number.

It is an amenable number.

20111444 is a deficient number, since it is larger than the sum of its proper divisors (15902380).

20111444 is a wasteful number, since it uses less digits than its factorization.

20111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116974 (or 116972 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20111444 is about 4484.5784640254. The cubic root of 20111444 is about 271.9450040195.

Adding to 20111444 its reverse (44411102), we get a palindrome (64522546).

The spelling of 20111444 in words is "twenty million, one hundred eleven thousand, four hundred forty-four".