18213132805 has 16 divisors (see below), whose sum is σ = 25278954624. Its totient is φ = 12338533440.

The previous prime is 18213132757. The next prime is 18213132811. The reversal of 18213132805 is 50823131281.

It is not a de Polignac number, because 18213132805 - 2²⁹ = 17676261893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3131886 + ... + 3137695.

It is an arithmetic number, because the mean of its divisors is an integer number (1579934664).

Almost surely, 2^18213132805 is an apocalyptic number.

It is an amenable number.

18213132805 is a deficient number, since it is larger than the sum of its proper divisors (7065821819).

18213132805 is an equidigital number, since it uses as much as digits as its factorization.

18213132805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6269676.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 18213132805 in words is "eighteen billion, two hundred thirteen million, one hundred thirty-two thousand, eight hundred five".