2131793638 has 16 divisors (see below), whose sum is σ = 3479172480. Its totient is φ = 973760256.

The previous prime is 2131793627. The next prime is 2131793639. The reversal of 2131793638 is 8363971312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2131793594 and 2131793603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131793639) 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 7 ways as a sum of consecutive naturals, for example, 420118 + ... + 425161.

It is an arithmetic number, because the mean of its divisors is an integer number (217448280).

Almost surely, 2^2131793638 is an apocalyptic number.

2131793638 is a deficient number, since it is larger than the sum of its proper divisors (1347378842).

2131793638 is a wasteful number, since it uses less digits than its factorization.

2131793638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845391.

The product of its digits is 163296, while the sum is 43.

The square root of 2131793638 is about 46171.3508357726. The cubic root of 2131793638 is about 1287.0094050417.

The spelling of 2131793638 in words is "two billion, one hundred thirty-one million, seven hundred ninety-three thousand, six hundred thirty-eight".