21310244044 has 12 divisors (see below), whose sum is σ = 37539901168. Its totient is φ = 10584558000.

The previous prime is 21310243961. The next prime is 21310244047. The reversal of 21310244044 is 44044201312.

It is not an unprimeable number, because it can be changed into a prime (21310244047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17640327 + ... + 17641534.

Almost surely, 2^21310244044 is an apocalyptic number.

It is an amenable number.

21310244044 is a deficient number, since it is larger than the sum of its proper divisors (16229657124).

21310244044 is a wasteful number, since it uses less digits than its factorization.

21310244044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35282016 (or 35282014 counting only the distinct ones).

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

Adding to 21310244044 its reverse (44044201312), we get a palindrome (65354445356).

The spelling of 21310244044 in words is "twenty-one billion, three hundred ten million, two hundred forty-four thousand, forty-four".