11321718887 has 2 divisors, whose sum is σ = 11321718888. Its totient is φ = 11321718886.

The previous prime is 11321718883. The next prime is 11321718901. The reversal of 11321718887 is 78881712311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11321718887 - 2² = 11321718883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321718883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660859443 + 5660859444.

It is an arithmetic number, because the mean of its divisors is an integer number (5660859444).

Almost surely, 2^11321718887 is an apocalyptic number.

11321718887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321718887 is an equidigital number, since it uses as much as digits as its factorization.

11321718887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 47.

The spelling of 11321718887 in words is "eleven billion, three hundred twenty-one million, seven hundred eighteen thousand, eight hundred eighty-seven".