21337283719 has 2 divisors, whose sum is σ = 21337283720. Its totient is φ = 21337283718.

The previous prime is 21337283717. The next prime is 21337283809. The reversal of 21337283719 is 91738273312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21337283719 - 2¹ = 21337283717 is a prime.

It is a super-2 number, since 2×21337283719² (a number of 21 digits) contains 22 as substring.

Together with 21337283717, 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 (21337283717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10668641859 + 10668641860.

It is an arithmetic number, because the mean of its divisors is an integer number (10668641860).

Almost surely, 2^21337283719 is an apocalyptic number.

21337283719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21337283719 is an equidigital number, since it uses as much as digits as its factorization.

21337283719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The spelling of 21337283719 in words is "twenty-one billion, three hundred thirty-seven million, two hundred eighty-three thousand, seven hundred nineteen".