21044024331 has 16 divisors (see below), whose sum is σ = 30744344448. Its totient is φ = 12697764800.

The previous prime is 21044024321. The next prime is 21044024341. The reversal of 21044024331 is 13342044012.

It is an interprime number because it is at equal distance from previous prime (21044024321) and next prime (21044024341).

It is a cyclic number.

It is not a de Polignac number, because 21044024331 - 2¹⁰ = 21044023307 is a prime.

It is a super-2 number, since 2×21044024331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21044024321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1397130 + ... + 1412111.

It is an arithmetic number, because the mean of its divisors is an integer number (1921521528).

Almost surely, 2^21044024331 is an apocalyptic number.

21044024331 is a deficient number, since it is larger than the sum of its proper divisors (9700320117).

21044024331 is a wasteful number, since it uses less digits than its factorization.

21044024331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809482.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21044024331 its reverse (13342044012), we get a palindrome (34386068343).

The spelling of 21044024331 in words is "twenty-one billion, forty-four million, twenty-four thousand, three hundred thirty-one".