21889135319 has 2 divisors, whose sum is σ = 21889135320. Its totient is φ = 21889135318.

The previous prime is 21889135277. The next prime is 21889135321. The reversal of 21889135319 is 91353198812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21889135319 - 2¹² = 21889131223 is a prime.

It is a super-2 number, since 2×21889135319² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 21889135321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21889135339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10944567659 + 10944567660.

It is an arithmetic number, because the mean of its divisors is an integer number (10944567660).

Almost surely, 2^21889135319 is an apocalyptic number.

21889135319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21889135319 is an equidigital number, since it uses as much as digits as its factorization.

21889135319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The spelling of 21889135319 in words is "twenty-one billion, eight hundred eighty-nine million, one hundred thirty-five thousand, three hundred nineteen".