21431044204 has 12 divisors (see below), whose sum is σ = 38018085784. Its totient is φ = 10568733984.

The previous prime is 21431044157. The next prime is 21431044223. The reversal of 21431044204 is 40244013412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36696702 + ... + 36697285.

Almost surely, 2^21431044204 is an apocalyptic number.

It is an amenable number.

21431044204 is a deficient number, since it is larger than the sum of its proper divisors (16587041580).

21431044204 is a wasteful number, since it uses less digits than its factorization.

21431044204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73394064 (or 73394062 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21431044204 its reverse (40244013412), we get a palindrome (61675057616).

The spelling of 21431044204 in words is "twenty-one billion, four hundred thirty-one million, forty-four thousand, two hundred four".