2131789436 has 24 divisors (see below), whose sum is σ = 4487978880. Its totient is φ = 865538352.

The previous prime is 2131789433. The next prime is 2131789501. The reversal of 2131789436 is 6349871312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131789433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003030 + ... + 2004093.

It is an arithmetic number, because the mean of its divisors is an integer number (186999120).

Almost surely, 2^2131789436 is an apocalyptic number.

It is an amenable number.

2131789436 is an abundant number, since it is smaller than the sum of its proper divisors (2356189444).

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

2131789436 is a wasteful number, since it uses less digits than its factorization.

2131789436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007153 (or 4007151 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 2131789436 is about 46171.3053313419. The cubic root of 2131789436 is about 1287.0085594287.

The spelling of 2131789436 in words is "two billion, one hundred thirty-one million, seven hundred eighty-nine thousand, four hundred thirty-six".