18058252885 has 4 divisors (see below), whose sum is σ = 21669903468. Its totient is φ = 14446602304.

The previous prime is 18058252879. The next prime is 18058252889. The reversal of 18058252885 is 58825285081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58825285081 = 179923 ⋅326947.

It can be written as a sum of positive squares in 2 ways, for example, as 6022846449 + 12035406436 = 77607^2 + 109706^2 .

It is a cyclic number.

It is not a de Polignac number, because 18058252885 - 2⁷ = 18058252757 is a prime.

It is a super-2 number, since 2×18058252885² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18058252889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805825284 + ... + 1805825293.

It is an arithmetic number, because the mean of its divisors is an integer number (5417475867).

Almost surely, 2^18058252885 is an apocalyptic number.

It is an amenable number.

18058252885 is a deficient number, since it is larger than the sum of its proper divisors (3611650583).

18058252885 is an equidigital number, since it uses as much as digits as its factorization.

18058252885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611650582.

The product of its (nonzero) digits is 2048000, while the sum is 52.

The spelling of 18058252885 in words is "eighteen billion, fifty-eight million, two hundred fifty-two thousand, eight hundred eighty-five".