18124135637 has 4 divisors (see below), whose sum is σ = 18127770540. Its totient is φ = 18120500736.

The previous prime is 18124135621. The next prime is 18124135643. The reversal of 18124135637 is 73653142181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73653142181 = 6121 ⋅12032861.

It can be written as a sum of positive squares in 2 ways, for example, as 2104423876 + 16019711761 = 45874^2 + 126569^2 .

It is a cyclic number.

It is not a de Polignac number, because 18124135637 - 2⁴ = 18124135621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18124135594 and 18124135603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18124131637) 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, 1809962 + ... + 1819947.

It is an arithmetic number, because the mean of its divisors is an integer number (4531942635).

Almost surely, 2^18124135637 is an apocalyptic number.

It is an amenable number.

18124135637 is a deficient number, since it is larger than the sum of its proper divisors (3634903).

18124135637 is an equidigital number, since it uses as much as digits as its factorization.

18124135637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634902.

The product of its digits is 120960, while the sum is 41.

The spelling of 18124135637 in words is "eighteen billion, one hundred twenty-four million, one hundred thirty-five thousand, six hundred thirty-seven".