2181774905093 has 16 divisors (see below), whose sum is σ = 2579495258880. Its totient is φ = 1805566955136.

The previous prime is 2181774905041. The next prime is 2181774905113. The reversal of 2181774905093 is 3905094771812.

It is not a de Polignac number, because 2181774905093 - 2⁶ = 2181774905029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181774901093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12285296 + ... + 12461622.

It is an arithmetic number, because the mean of its divisors is an integer number (161218453680).

Almost surely, 2^{2181774905093} is an apocalyptic number.

It is an amenable number.

2181774905093 is a deficient number, since it is larger than the sum of its proper divisors (397720353787).

2181774905093 is a wasteful number, since it uses less digits than its factorization.

2181774905093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237316.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 2181774905093 in words is "two trillion, one hundred eighty-one billion, seven hundred seventy-four million, nine hundred five thousand, ninety-three".