10326018991 has 4 divisors (see below), whose sum is σ = 10520849592. Its totient is φ = 10131188392.

The previous prime is 10326018959. The next prime is 10326019007. The reversal of 10326018991 is 19981062301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10326018991 - 2⁵ = 10326018959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10326018491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97415221 + ... + 97415326.

It is an arithmetic number, because the mean of its divisors is an integer number (2630212398).

Almost surely, 2^10326018991 is an apocalyptic number.

10326018991 is a deficient number, since it is larger than the sum of its proper divisors (194830601).

10326018991 is an equidigital number, since it uses as much as digits as its factorization.

10326018991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194830600.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 10326018991 in words is "ten billion, three hundred twenty-six million, eighteen thousand, nine hundred ninety-one".