2091363138 has 30 divisors (see below), whose sum is σ = 4687507209. Its totient is φ = 696927024.

The previous prime is 2091363133. The next prime is 2091363139. The reversal of 2091363138 is 8313631902.

2091363138 is a `hidden beast` number, since 2 + 0 + 9 + 13 + 631 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2019333969 + 72029169 = 44937^2 + 8487^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32337.

It is not an unprimeable number, because it can be changed into a prime (2091363133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 580270 + ... + 583862.

Almost surely, 2^2091363138 is an apocalyptic number.

2091363138 is an abundant number, since it is smaller than the sum of its proper divisors (2596144071).

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

2091363138 is an frugal number, since it uses more digits than its factorization.

2091363138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200 (or 3598 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2091363138 is about 45731.4239664588. The cubic root of 2091363138 is about 1278.8211676837.

Multiplying 2091363138 by its product of nonzero digits (23328), we get a square (48787319283264 = 6984792²).

The spelling of 2091363138 in words is "two billion, ninety-one million, three hundred sixty-three thousand, one hundred thirty-eight".