18264266505 has 64 divisors (see below), whose sum is σ = 33704985600. Its totient is φ = 9377199360.

The previous prime is 18264266483. The next prime is 18264266509. The reversal of 18264266505 is 50566246281.

18264266505 is a `hidden beast` number, since 1 + 82 + 6 + 4 + 2 + 66 + 505 = 666.

It is not a de Polignac number, because 18264266505 - 2¹⁷ = 18264135433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18264266509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 363451 + ... + 410639.

It is an arithmetic number, because the mean of its divisors is an integer number (526640400).

Almost surely, 2^18264266505 is an apocalyptic number.

18264266505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18264266505 is a deficient number, since it is larger than the sum of its proper divisors (15440719095).

18264266505 is a wasteful number, since it uses less digits than its factorization.

18264266505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47311 (or 47305 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 18264266505 in words is "eighteen billion, two hundred sixty-four million, two hundred sixty-six thousand, five hundred five".