18350231000 has 32 divisors (see below), whose sum is σ = 42939542880. Its totient is φ = 7340092000.

The previous prime is 18350230963. The next prime is 18350231063. The reversal of 18350231000 is 13205381.

It is a super-2 number, since 2×18350231000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9174116 + ... + 9176115.

It is an arithmetic number, because the mean of its divisors is an integer number (1341860715).

Almost surely, 2^18350231000 is an apocalyptic number.

18350231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18350231000 is an abundant number, since it is smaller than the sum of its proper divisors (24589311880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18350231000 is a wasteful number, since it uses less digits than its factorization.

18350231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350252 (or 18350238 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 18350231000 its reverse (13205381), we get a palindrome (18363436381).

The spelling of 18350231000 in words is "eighteen billion, three hundred fifty million, two hundred thirty-one thousand".