2151868120 has 32 divisors (see below), whose sum is σ = 4847850000. Its totient is φ = 859654528.

The previous prime is 2151868099. The next prime is 2151868127. The reversal of 2151868120 is 218681512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151868127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870 + ... + 65629.

Almost surely, 2^2151868120 is an apocalyptic number.

2151868120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151868120 is an abundant number, since it is smaller than the sum of its proper divisors (2695981880).

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

2151868120 is a wasteful number, since it uses less digits than its factorization.

2151868120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68307 (or 68303 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 2151868120 is about 46388.2325595619. The cubic root of 2151868120 is about 1291.0365884484.

The spelling of 2151868120 in words is "two billion, one hundred fifty-one million, eight hundred sixty-eight thousand, one hundred twenty".