1897734882918 has 32 divisors (see below), whose sum is σ = 4337856209664. Its totient is φ = 542187906912.

The previous prime is 1897734882899. The next prime is 1897734882931. The reversal of 1897734882918 is 8192884377981.

It is a self number, because there is not a number n which added to its sum of digits gives 1897734882918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139821 + ... + 1953207.

It is an arithmetic number, because the mean of its divisors is an integer number (135558006552).

Almost surely, 2^{1897734882918} is an apocalyptic number.

1897734882918 is an abundant number, since it is smaller than the sum of its proper divisors (2440121326746).

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

1897734882918 is a wasteful number, since it uses less digits than its factorization.

1897734882918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838316.

The product of its digits is 390168576, while the sum is 75.

The spelling of 1897734882918 in words is "one trillion, eight hundred ninety-seven billion, seven hundred thirty-four million, eight hundred eighty-two thousand, nine hundred eighteen".