1931227953018 has 128 divisors (see below), whose sum is σ = 4809364180992. Its totient is φ = 503402812416.

The previous prime is 1931227953001. The next prime is 1931227953019. The reversal of 1931227953018 is 8103597221391.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1931227953019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25258555 + ... + 25334897.

It is an arithmetic number, because the mean of its divisors is an integer number (37573157664).

Almost surely, 2^{1931227953018} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1931227953018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2404682090496).

1931227953018 is an abundant number, since it is smaller than the sum of its proper divisors (2878136227974).

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

1931227953018 is a wasteful number, since it uses less digits than its factorization.

1931227953018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76908.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 1931227953018 in words is "one trillion, nine hundred thirty-one billion, two hundred twenty-seven million, nine hundred fifty-three thousand, eighteen".