2181793521006 has 24 divisors (see below), whose sum is σ = 5156966504664. Its totient is φ = 661149551760.

The previous prime is 2181793520911. The next prime is 2181793521029. The reversal of 2181793521006 is 6001253971812.

2181793521006 is a `hidden beast` number, since 21 + 8 + 17 + 93 + 521 + 0 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5509579401 + ... + 5509579796.

It is an arithmetic number, because the mean of its divisors is an integer number (214873604361).

Almost surely, 2^{2181793521006} is an apocalyptic number.

2181793521006 is an abundant number, since it is smaller than the sum of its proper divisors (2975172983658).

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

2181793521006 is a wasteful number, since it uses less digits than its factorization.

2181793521006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019159216 (or 11019159213 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 2181793521006 in words is "two trillion, one hundred eighty-one billion, seven hundred ninety-three million, five hundred twenty-one thousand, six".