21303112004 has 6 divisors (see below), whose sum is σ = 37280446014. Its totient is φ = 10651556000.

The previous prime is 21303111997. The next prime is 21303112013. The reversal of 21303112004 is 40021130312.

It can be written as a sum of positive squares in only one way, i.e., 21059814400 + 243297604 = 145120^2 + 15598^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662888997 + ... + 2662889004.

It is an arithmetic number, because the mean of its divisors is an integer number (6213407669).

Almost surely, 2^21303112004 is an apocalyptic number.

It is an amenable number.

21303112004 is a deficient number, since it is larger than the sum of its proper divisors (15977334010).

21303112004 is a wasteful number, since it uses less digits than its factorization.

21303112004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5325778005 (or 5325778003 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21303112004 its reverse (40021130312), we get a palindrome (61324242316).

The spelling of 21303112004 in words is "twenty-one billion, three hundred three million, one hundred twelve thousand, four".