21495269119 has 2 divisors, whose sum is σ = 21495269120. Its totient is φ = 21495269118.

The previous prime is 21495269111. The next prime is 21495269141. The reversal of 21495269119 is 91196259412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21495269119 - 2³ = 21495269111 is a prime.

It is a super-2 number, since 2×21495269119² (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 (21495269111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10747634559 + 10747634560.

It is an arithmetic number, because the mean of its divisors is an integer number (10747634560).

Almost surely, 2^21495269119 is an apocalyptic number.

21495269119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21495269119 is an equidigital number, since it uses as much as digits as its factorization.

21495269119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 49.

The spelling of 21495269119 in words is "twenty-one billion, four hundred ninety-five million, two hundred sixty-nine thousand, one hundred nineteen".