18235231494529 has 27 divisors (see below), whose sum is σ = 21743868356931. Its totient is φ = 15247949206560.

The previous prime is 18235231494523. The next prime is 18235231494569. The reversal of 18235231494529 is 92549413253281.

The square root of 18235231494529 is 4270273.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 878675640129 + 17356555854400 = 937377^2 + 4166120^2 .

It is not a de Polignac number, because 18235231494529 - 2⁵ = 18235231494497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18235231494523) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1225560912 + ... + 1225575790.

Almost surely, 2^{18235231494529} is an apocalyptic number.

18235231494529 is the 4270273-rd square number.

18235231494529 is the 2135137-th centered octagonal number.

It is an amenable number.

18235231494529 is a deficient number, since it is larger than the sum of its proper divisors (3508636862402).

18235231494529 is an frugal number, since it uses more digits than its factorization.

18235231494529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29854 (or 14927 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 58.

The spelling of 18235231494529 in words is "eighteen trillion, two hundred thirty-five billion, two hundred thirty-one million, four hundred ninety-four thousand, five hundred twenty-nine".