2136168720 has 240 divisors, whose sum is σ = 8559630720. Its totient is φ = 488242944.

The previous prime is 2136168709. The next prime is 2136168721. The reversal of 2136168720 is 278616312.

2136168720 is a `hidden beast` number, since 2 + 13 + 616 + 8 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (2136168721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95749 + ... + 115931.

It is an arithmetic number, because the mean of its divisors is an integer number (35665128).

Almost surely, 2^2136168720 is an apocalyptic number.

2136168720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2136168720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4279815360).

2136168720 is an abundant number, since it is smaller than the sum of its proper divisors (6423462000).

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

2136168720 is a wasteful number, since it uses less digits than its factorization.

2136168720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20219 (or 20200 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2136168720 is about 46218.7053042380. The cubic root of 2136168720 is about 1287.8892469355.

The spelling of 2136168720 in words is "two billion, one hundred thirty-six million, one hundred sixty-eight thousand, seven hundred twenty".