18050181831 has 20 divisors (see below), whose sum is σ = 29415112584. Its totient is φ = 10939503600.

The previous prime is 18050181829. The next prime is 18050181847. The reversal of 18050181831 is 13818105081.

It is a happy number.

It is not a de Polignac number, because 18050181831 - 2¹ = 18050181829 is a prime.

It is a super-2 number, since 2×18050181831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18050181031) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10128280 + ... + 10130061.

Almost surely, 2^18050181831 is an apocalyptic number.

18050181831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18050181831 is a deficient number, since it is larger than the sum of its proper divisors (11364930753).

18050181831 is a wasteful number, since it uses less digits than its factorization.

18050181831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20258364 (or 20258355 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 36.

The spelling of 18050181831 in words is "eighteen billion, fifty million, one hundred eighty-one thousand, eight hundred thirty-one".