2136546421 has 4 divisors (see below), whose sum is σ = 2139040332. Its totient is φ = 2134052512.

The previous prime is 2136546341. The next prime is 2136546509. The reversal of 2136546421 is 1246456312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1667823921 + 468722500 = 40839^2 + 21650^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136546421 - 2²⁹ = 1599675509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133546421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245670 + ... + 1247383.

It is an arithmetic number, because the mean of its divisors is an integer number (534760083).

Almost surely, 2^2136546421 is an apocalyptic number.

It is an amenable number.

2136546421 is a deficient number, since it is larger than the sum of its proper divisors (2493911).

2136546421 is an equidigital number, since it uses as much as digits as its factorization.

2136546421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493910.

The product of its digits is 34560, while the sum is 34.

The square root of 2136546421 is about 46222.7911424656. The cubic root of 2136546421 is about 1287.9651473681.

The spelling of 2136546421 in words is "two billion, one hundred thirty-six million, five hundred forty-six thousand, four hundred twenty-one".