2186117521842 has 16 divisors (see below), whose sum is σ = 4372459483392. Its totient is φ = 728668434000.

The previous prime is 2186117521807. The next prime is 2186117521859. The reversal of 2186117521842 is 2481257116812.

It is a junction number, because it is equal to n+sod(n) for n = 2186117521791 and 2186117521800.

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 7 ways as a sum of consecutive naturals, for example, 9224898 + ... + 9458909.

It is an arithmetic number, because the mean of its divisors is an integer number (273278717712).

Almost surely, 2^{2186117521842} is an apocalyptic number.

2186117521842 is an abundant number, since it is smaller than the sum of its proper divisors (2186341961550).

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

2186117521842 is a wasteful number, since it uses less digits than its factorization.

2186117521842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18703313.

The product of its digits is 430080, while the sum is 48.

The spelling of 2186117521842 in words is "two trillion, one hundred eighty-six billion, one hundred seventeen million, five hundred twenty-one thousand, eight hundred forty-two".