13340187857 has 2 divisors, whose sum is σ = 13340187858. Its totient is φ = 13340187856.

The previous prime is 13340187853. The next prime is 13340187863. The reversal of 13340187857 is 75878104331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6787123456 + 6553064401 = 82384^2 + 80951^2 .

It is an emirp because it is prime and its reverse (75878104331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13340187857 - 2² = 13340187853 is a prime.

It is a super-2 number, since 2×13340187857² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13340187853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6670093928 + 6670093929.

It is an arithmetic number, because the mean of its divisors is an integer number (6670093929).

Almost surely, 2^13340187857 is an apocalyptic number.

It is an amenable number.

13340187857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13340187857 is an equidigital number, since it uses as much as digits as its factorization.

13340187857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 13340187857 in words is "thirteen billion, three hundred forty million, one hundred eighty-seven thousand, eight hundred fifty-seven".