21303014431 has 2 divisors, whose sum is σ = 21303014432. Its totient is φ = 21303014430.

The previous prime is 21303014429. The next prime is 21303014441. The reversal of 21303014431 is 13441030312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21303014431 - 2¹ = 21303014429 is a prime.

It is a super-2 number, since 2×21303014431² (a number of 21 digits) contains 22 as substring.

Together with 21303014429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303014401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651507215 + 10651507216.

It is an arithmetic number, because the mean of its divisors is an integer number (10651507216).

Almost surely, 2^21303014431 is an apocalyptic number.

21303014431 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303014431 is an equidigital number, since it uses as much as digits as its factorization.

21303014431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21303014431 its reverse (13441030312), we get a palindrome (34744044743).

The spelling of 21303014431 in words is "twenty-one billion, three hundred three million, fourteen thousand, four hundred thirty-one".