2186340920 has 16 divisors (see below), whose sum is σ = 4919267160. Its totient is φ = 874536352.

The previous prime is 2186340911. The next prime is 2186340953. The reversal of 2186340920 is 290436812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27329222 + ... + 27329301.

Almost surely, 2^2186340920 is an apocalyptic number.

2186340920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2186340920 is an abundant number, since it is smaller than the sum of its proper divisors (2732926240).

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

2186340920 is a wasteful number, since it uses less digits than its factorization.

2186340920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54658534 (or 54658530 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2186340920 is about 46758.3246064270. The cubic root of 2186340920 is about 1297.8942081532.

The spelling of 2186340920 in words is "two billion, one hundred eighty-six million, three hundred forty thousand, nine hundred twenty".