18840339578116 has 81 divisors (see below), whose sum is σ = 39725405054517. Its totient is φ = 7795273372320.

The previous prime is 18840339578077. The next prime is 18840339578167. The reversal of 18840339578116 is 61187593304881.

The square root of 18840339578116 is 4340546.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9879417067716 + 8960922510400 = 3143154^2 + 2993480^2 .

It is a super-2 number, since 2×18840339578116² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1762256331 + ... + 1762267021.

Almost surely, 2^{18840339578116} is an apocalyptic number.

18840339578116 is the 4340546-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18840339578116

18840339578116 is an abundant number, since it is smaller than the sum of its proper divisors (20885065476401).

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

18840339578116 is an frugal number, since it uses more digits than its factorization.

18840339578116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21458 (or 10729 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 18840339578116 in words is "eighteen trillion, eight hundred forty billion, three hundred thirty-nine million, five hundred seventy-eight thousand, one hundred sixteen".