20311444 has 12 divisors (see below), whose sum is σ = 35632800. Its totient is φ = 10130648.

The previous prime is 20311439. The next prime is 20311469. The reversal of 20311444 is 44411302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4384 + ... + 7735.

It is an arithmetic number, because the mean of its divisors is an integer number (2969400).

Almost surely, 2^20311444 is an apocalyptic number.

It is an amenable number.

20311444 is a deficient number, since it is larger than the sum of its proper divisors (15321356).

20311444 is a wasteful number, since it uses less digits than its factorization.

20311444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12542 (or 12540 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20311444 is about 4506.8219401259. The cubic root of 20311444 is about 272.8434924336.

Adding to 20311444 its reverse (44411302), we get a palindrome (64722746).

The spelling of 20311444 in words is "twenty million, three hundred eleven thousand, four hundred forty-four".