1938150018 has 96 divisors (see below), whose sum is σ = 5072598720. Its totient is φ = 553695912.

The previous prime is 1938150007. The next prime is 1938150023. The reversal of 1938150018 is 8100518391.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209805 + ... + 218847.

It is an arithmetic number, because the mean of its divisors is an integer number (52839570).

Almost surely, 2^1938150018 is an apocalyptic number.

1938150018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938150018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2536299360).

1938150018 is an abundant number, since it is smaller than the sum of its proper divisors (3134448702).

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

1938150018 is an frugal number, since it uses more digits than its factorization.

1938150018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9080 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1938150018 is about 44024.4252432669. The cubic root of 1938150018 is about 1246.7971375202.

The spelling of 1938150018 in words is "one billion, nine hundred thirty-eight million, one hundred fifty thousand, eighteen".