21193774061140 has 48 divisors (see below), whose sum is σ = 44949371256720. Its totient is φ = 8393240908800.

The previous prime is 21193774061101. The next prime is 21193774061191. The reversal of 21193774061140 is 4116047739112.

It can be written as a sum of positive squares in 8 ways, for example, as 26744677444 + 21167029383696 = 163538^2 + 4600764^2 .

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, 54250426 + ... + 54639694.

It is an arithmetic number, because the mean of its divisors is an integer number (936445234515).

Almost surely, 2^{21193774061140} is an apocalyptic number.

21193774061140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21193774061140 is an abundant number, since it is smaller than the sum of its proper divisors (23755597195580).

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

21193774061140 is a wasteful number, since it uses less digits than its factorization.

21193774061140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416332 (or 416330 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 21193774061140 in words is "twenty-one trillion, one hundred ninety-three billion, seven hundred seventy-four million, sixty-one thousand, one hundred forty".