18233516885 has 8 divisors (see below), whose sum is σ = 21893154360. Its totient is φ = 14578190784.

The previous prime is 18233516879. The next prime is 18233516929. The reversal of 18233516885 is 58861533281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145924 + 18233370961 = 382^2 + 135031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18233516885 - 2⁸ = 18233516629 is a prime.

It is a super-2 number, since 2×18233516885² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068530 + ... + 1085459.

It is an arithmetic number, because the mean of its divisors is an integer number (2736644295).

Almost surely, 2^18233516885 is an apocalyptic number.

It is an amenable number.

18233516885 is a deficient number, since it is larger than the sum of its proper divisors (3659637475).

18233516885 is a wasteful number, since it uses less digits than its factorization.

18233516885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155687.

The product of its digits is 1382400, while the sum is 50.

The spelling of 18233516885 in words is "eighteen billion, two hundred thirty-three million, five hundred sixteen thousand, eight hundred eighty-five".