21303032244431 has 16 divisors (see below), whose sum is σ = 24588038749248. Its totient is φ = 18078464544000.

The previous prime is 21303032244401. The next prime is 21303032244551. The reversal of 21303032244431 is 13444223030312.

It is a de Polignac number, because none of the positive numbers 2^k-21303032244431 is a prime.

It is a super-2 number, since 2×21303032244431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303032244401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27130061 + ... + 27904233.

It is an arithmetic number, because the mean of its divisors is an integer number (1536752421828).

Almost surely, 2^{21303032244431} is an apocalyptic number.

21303032244431 is a deficient number, since it is larger than the sum of its proper divisors (3285006504817).

21303032244431 is a wasteful number, since it uses less digits than its factorization.

21303032244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813202.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 21303032244431 its reverse (13444223030312), we get a palindrome (34747255274743).

It can be divided in two parts, 2130303 and 2244431, that added together give a palindrome (4374734).

The spelling of 21303032244431 in words is "twenty-one trillion, three hundred three billion, thirty-two million, two hundred forty-four thousand, four hundred thirty-one".