20003444 has 6 divisors (see below), whose sum is σ = 35006034. Its totient is φ = 10001720.

The previous prime is 20003443. The next prime is 20003461. The reversal of 20003444 is 44430002.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 9375844 = 3260^2 + 3062^2 .

It is a super-2 number, since 2×20003444² = 800275543722272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500427 + ... + 2500434.

It is an arithmetic number, because the mean of its divisors is an integer number (5834339).

Almost surely, 2^20003444 is an apocalyptic number.

It is an amenable number.

20003444 is a deficient number, since it is larger than the sum of its proper divisors (15002590).

20003444 is a wasteful number, since it uses less digits than its factorization.

20003444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000865 (or 5000863 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20003444 is about 4472.5209893303. The cubic root of 20003444 is about 271.4573415224.

Adding to 20003444 its reverse (44430002), we get a palindrome (64433446).

The spelling of 20003444 in words is "twenty million, three thousand, four hundred forty-four".