21433044319 has 2 divisors, whose sum is σ = 21433044320. Its totient is φ = 21433044318.

The previous prime is 21433044307. The next prime is 21433044343. The reversal of 21433044319 is 91344033412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21433044319 - 2²⁵ = 21399489887 is a prime.

It is a super-2 number, since 2×21433044319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433044349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716522159 + 10716522160.

It is an arithmetic number, because the mean of its divisors is an integer number (10716522160).

Almost surely, 2^21433044319 is an apocalyptic number.

21433044319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433044319 is an equidigital number, since it uses as much as digits as its factorization.

21433044319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 21433044319 in words is "twenty-one billion, four hundred thirty-three million, forty-four thousand, three hundred nineteen".