20403003444 has 24 divisors (see below), whose sum is σ = 47610003168. Its totient is φ = 6800573280.

The previous prime is 20403003443. The next prime is 20403003449. The reversal of 20403003444 is 44430030402.

It is a happy number.

It is a super-2 number, since 2×20403003444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403003443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189279 + ... + 276825.

It is an arithmetic number, because the mean of its divisors is an integer number (1983750132).

Almost surely, 2^20403003444 is an apocalyptic number.

It is an amenable number.

20403003444 is an abundant number, since it is smaller than the sum of its proper divisors (27206999724).

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

20403003444 is a wasteful number, since it uses less digits than its factorization.

20403003444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106975 (or 106973 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20403003444 its reverse (44430030402), we get a palindrome (64833033846).

The spelling of 20403003444 in words is "twenty billion, four hundred three million, three thousand, four hundred forty-four".