11512018913 has 2 divisors, whose sum is σ = 11512018914. Its totient is φ = 11512018912.

The previous prime is 11512018891. The next prime is 11512018943. The reversal of 11512018913 is 31981021511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7706732944 + 3805285969 = 87788^2 + 61687^2 .

It is an emirp because it is prime and its reverse (31981021511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11512018913 - 2⁸ = 11512018657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11512018913.

It is not a weakly prime, because it can be changed into another prime (11512018943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756009456 + 5756009457.

It is an arithmetic number, because the mean of its divisors is an integer number (5756009457).

Almost surely, 2^11512018913 is an apocalyptic number.

It is an amenable number.

11512018913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512018913 is an equidigital number, since it uses as much as digits as its factorization.

11512018913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 32.

The spelling of 11512018913 in words is "eleven billion, five hundred twelve million, eighteen thousand, nine hundred thirteen".