20403205444 has 12 divisors (see below), whose sum is σ = 35740248768. Its totient is φ = 10191705800.

The previous prime is 20403205429. The next prime is 20403205453. The reversal of 20403205444 is 44450230402.

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, 2469592 + ... + 2477839.

It is an arithmetic number, because the mean of its divisors is an integer number (2978354064).

Almost surely, 2^20403205444 is an apocalyptic number.

It is an amenable number.

20403205444 is a deficient number, since it is larger than the sum of its proper divisors (15337043324).

20403205444 is a wasteful number, since it uses less digits than its factorization.

20403205444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948466 (or 4948464 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 20403205444 its reverse (44450230402), we get a palindrome (64853435846).

The spelling of 20403205444 in words is "twenty billion, four hundred three million, two hundred five thousand, four hundred forty-four".