2086819381 has 16 divisors (see below), whose sum is σ = 2275560000. Its totient is φ = 1906160256.

The previous prime is 2086819379. The next prime is 2086819387. The reversal of 2086819381 is 1839186802.

It is not a de Polignac number, because 2086819381 - 2¹ = 2086819379 is a prime.

It is a super-2 number, since 2×2086819381² = 8709630257834446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2086819387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471105 + ... + 475513.

It is an arithmetic number, because the mean of its divisors is an integer number (142222500).

Almost surely, 2^2086819381 is an apocalyptic number.

It is an amenable number.

2086819381 is a deficient number, since it is larger than the sum of its proper divisors (188740619).

2086819381 is a wasteful number, since it uses less digits than its factorization.

2086819381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 2086819381 is about 45681.7182360734. The cubic root of 2086819381 is about 1277.8943613431.

The spelling of 2086819381 in words is "two billion, eighty-six million, eight hundred nineteen thousand, three hundred eighty-one".