20083819 has 4 divisors (see below), whose sum is σ = 22952944. Its totient is φ = 17214696.

The previous prime is 20083813. The next prime is 20083831. The reversal of 20083819 is 91838002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91838002 = 2 ⋅45919001.

It is a cyclic number.

It is not a de Polignac number, because 20083819 - 2⁵ = 20083787 is a prime.

It is a super-2 number, since 2×20083819² = 806719571249522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20083813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434552 + ... + 1434565.

It is an arithmetic number, because the mean of its divisors is an integer number (5738236).

Almost surely, 2^20083819 is an apocalyptic number.

20083819 is a deficient number, since it is larger than the sum of its proper divisors (2869125).

20083819 is an equidigital number, since it uses as much as digits as its factorization.

20083819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869124.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 20083819 is about 4481.4974060017. The cubic root of 20083819 is about 271.8204327709.

It can be divided in two parts, 20083 and 819, that added together give a palindrome (20902).

The spelling of 20083819 in words is "twenty million, eighty-three thousand, eight hundred nineteen".