2187943854 has 32 divisors (see below), whose sum is σ = 4522850304. Its totient is φ = 704881440.

The previous prime is 2187943853. The next prime is 2187943883. The reversal of 2187943854 is 4583497812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2187943797 and 2187943806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187943853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145932 + ... + 160224.

It is an arithmetic number, because the mean of its divisors is an integer number (141339072).

Almost surely, 2^2187943854 is an apocalyptic number.

2187943854 is an abundant number, since it is smaller than the sum of its proper divisors (2334906450).

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

2187943854 is a wasteful number, since it uses less digits than its factorization.

2187943854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15152.

The product of its digits is 1935360, while the sum is 51.

The square root of 2187943854 is about 46775.4620928538. The cubic root of 2187943854 is about 1298.2113179739.

The spelling of 2187943854 in words is "two billion, one hundred eighty-seven million, nine hundred forty-three thousand, eight hundred fifty-four".