20401444 has 18 divisors (see below), whose sum is σ = 41531910. Its totient is φ = 8743392.

The previous prime is 20401439. The next prime is 20401453. The reversal of 20401444 is 44410402.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 705600 = 4438^2 + 840^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51849 + ... + 52240.

Almost surely, 2^20401444 is an apocalyptic number.

It is an amenable number.

20401444 is an abundant number, since it is smaller than the sum of its proper divisors (21130466).

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

20401444 is a wasteful number, since it uses less digits than its factorization.

20401444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104107 (or 104098 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 20401444 is about 4516.7957669126. The cubic root of 20401444 is about 273.2458884795.

Adding to 20401444 its reverse (44410402), we get a palindrome (64811846).

The spelling of 20401444 in words is "twenty million, four hundred one thousand, four hundred forty-four".