18555991830253 has 8 divisors (see below), whose sum is σ = 18906867309816. Its totient is φ = 18205144588800.

The previous prime is 18555991830223. The next prime is 18555991830269. The reversal of 18555991830253 is 35203819955581.

It can be written as a sum of positive squares in 4 ways, for example, as 2685671995204 + 15870319835049 = 1638802^2 + 3983757^2 .

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 18555991830253 - 2¹³ = 18555991822061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555991830223) 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 7 ways as a sum of consecutive naturals, for example, 5730508 + ... + 8363653.

It is an arithmetic number, because the mean of its divisors is an integer number (2363358413727).

Almost surely, 2^{18555991830253} is an apocalyptic number.

It is an amenable number.

18555991830253 is a deficient number, since it is larger than the sum of its proper divisors (350875479563).

18555991830253 is a wasteful number, since it uses less digits than its factorization.

18555991830253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14119055.

The product of its (nonzero) digits is 58320000, while the sum is 64.

The spelling of 18555991830253 in words is "eighteen trillion, five hundred fifty-five billion, nine hundred ninety-one million, eight hundred thirty thousand, two hundred fifty-three".