2096187781 has 2 divisors, whose sum is σ = 2096187782. Its totient is φ = 2096187780.

The previous prime is 2096187767. The next prime is 2096187857. The reversal of 2096187781 is 1877816902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1702800225 + 393387556 = 41265^2 + 19834^2 .

It is a cyclic number.

It is not a de Polignac number, because 2096187781 - 2¹⁷ = 2096056709 is a prime.

It is a super-2 number, since 2×2096187781² = 8788006426427407922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2096187701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048093890 + 1048093891.

It is an arithmetic number, because the mean of its divisors is an integer number (1048093891).

Almost surely, 2^2096187781 is an apocalyptic number.

It is an amenable number.

2096187781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2096187781 is an equidigital number, since it uses as much as digits as its factorization.

2096187781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 2096187781 is about 45784.1433358756. The cubic root of 2096187781 is about 1279.8037990697.

The spelling of 2096187781 in words is "two billion, ninety-six million, one hundred eighty-seven thousand, seven hundred eighty-one".