2168134740 has 72 divisors (see below), whose sum is σ = 6674871840. Its totient is φ = 569536704.

The previous prime is 2168134663. The next prime is 2168134741. The reversal of 2168134740 is 474318612.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2168134695 and 2168134704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168134741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77830 + ... + 101949.

Almost surely, 2^2168134740 is an apocalyptic number.

2168134740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168134740 is an abundant number, since it is smaller than the sum of its proper divisors (4506737100).

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

2168134740 is a wasteful number, since it uses less digits than its factorization.

2168134740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179861 (or 179856 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2168134740 is about 46563.2337794531. The cubic root of 2168134740 is about 1294.2815372416.

The spelling of 2168134740 in words is "two billion, one hundred sixty-eight million, one hundred thirty-four thousand, seven hundred forty".