18131035050 has 72 divisors (see below), whose sum is σ = 48754322604. Its totient is φ = 4830746880.

The previous prime is 18131035037. The next prime is 18131035081. The reversal of 18131035050 is 5053013181.

It can be written as a sum of positive squares in 6 ways, for example, as 7504930161 + 10626104889 = 86631^2 + 103083^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 519964 + ... + 553736.

Almost surely, 2^18131035050 is an apocalyptic number.

18131035050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18131035050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24377161302).

18131035050 is an abundant number, since it is smaller than the sum of its proper divisors (30623287554).

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

18131035050 is a wasteful number, since it uses less digits than its factorization.

18131035050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34984 (or 34976 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 18131035050 in words is "eighteen billion, one hundred thirty-one million, thirty-five thousand, fifty".