18540500831 has 8 divisors (see below), whose sum is σ = 18824487600. Its totient is φ = 18256727808.

The previous prime is 18540500807. The next prime is 18540500861. The reversal of 18540500831 is 13800504581.

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 18540500831 - 2³⁰ = 17466759007 is a prime.

It is a super-2 number, since 2×18540500831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18540500791 and 18540500800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18540500861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125945 + ... + 230093.

It is an arithmetic number, because the mean of its divisors is an integer number (2353060950).

Almost surely, 2^18540500831 is an apocalyptic number.

18540500831 is a deficient number, since it is larger than the sum of its proper divisors (283986769).

18540500831 is a wasteful number, since it uses less digits than its factorization.

18540500831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106873.

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 18540500831 in words is "eighteen billion, five hundred forty million, five hundred thousand, eight hundred thirty-one".