2187873420 has 48 divisors (see below), whose sum is σ = 6148207968. Its totient is φ = 581322240.

The previous prime is 2187873407. The next prime is 2187873421. The reversal of 2187873420 is 243787812.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2187873421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49201 + ... + 82440.

It is an arithmetic number, because the mean of its divisors is an integer number (128087666).

Almost surely, 2^2187873420 is an apocalyptic number.

2187873420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187873420 is an abundant number, since it is smaller than the sum of its proper divisors (3960334548).

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

2187873420 is a wasteful number, since it uses less digits than its factorization.

2187873420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131930 (or 131928 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 2187873420 is about 46774.7091920409. The cubic root of 2187873420 is about 1298.1973872085.

The spelling of 2187873420 in words is "two billion, one hundred eighty-seven million, eight hundred seventy-three thousand, four hundred twenty".