18233154811 has 4 divisors (see below), whose sum is σ = 18235378224. Its totient is φ = 18230931400.

The previous prime is 18233154799. The next prime is 18233154839. The reversal of 18233154811 is 11845133281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11845133281 = 13033 ⋅908857.

It is a cyclic number.

It is not a de Polignac number, because 18233154811 - 2¹³ = 18233146619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18233154871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099360 + ... + 1115821.

It is an arithmetic number, because the mean of its divisors is an integer number (4558844556).

Almost surely, 2^18233154811 is an apocalyptic number.

18233154811 is a deficient number, since it is larger than the sum of its proper divisors (2223413).

18233154811 is an equidigital number, since it uses as much as digits as its factorization.

18233154811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223412.

The product of its digits is 23040, while the sum is 37.

The spelling of 18233154811 in words is "eighteen billion, two hundred thirty-three million, one hundred fifty-four thousand, eight hundred eleven".