2136381851 has 4 divisors (see below), whose sum is σ = 2181836832. Its totient is φ = 2090926872.

The previous prime is 2136381811. The next prime is 2136381881. The reversal of 2136381851 is 1581836312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2136381851 - 2⁶ = 2136381787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136381811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22727420 + ... + 22727513.

It is an arithmetic number, because the mean of its divisors is an integer number (545459208).

Almost surely, 2^2136381851 is an apocalyptic number.

2136381851 is a deficient number, since it is larger than the sum of its proper divisors (45454981).

2136381851 is an equidigital number, since it uses as much as digits as its factorization.

2136381851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45454980.

The product of its digits is 34560, while the sum is 38.

The square root of 2136381851 is about 46221.0109257684. The cubic root of 2136381851 is about 1287.9320775091.

The spelling of 2136381851 in words is "two billion, one hundred thirty-six million, three hundred eighty-one thousand, eight hundred fifty-one".