2129211636 has 12 divisors (see below), whose sum is σ = 4968160512. Its totient is φ = 709737208.

The previous prime is 2129211619. The next prime is 2129211641. The reversal of 2129211636 is 6361129212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2129211597 and 2129211606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88717140 + ... + 88717163.

It is an arithmetic number, because the mean of its divisors is an integer number (414013376).

Almost surely, 2^2129211636 is an apocalyptic number.

It is an amenable number.

2129211636 is an abundant number, since it is smaller than the sum of its proper divisors (2838948876).

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

2129211636 is a wasteful number, since it uses less digits than its factorization.

2129211636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177434310 (or 177434308 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 2129211636 is about 46143.3812805260. The cubic root of 2129211636 is about 1286.4895918480.

The spelling of 2129211636 in words is "two billion, one hundred twenty-nine million, two hundred eleven thousand, six hundred thirty-six".