20122819 has 2 divisors, whose sum is σ = 20122820. Its totient is φ = 20122818.

The previous prime is 20122807. The next prime is 20122829. The reversal of 20122819 is 91822102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20122819 - 2⁵ = 20122787 is a prime.

It is a super-2 number, since 2×20122819² = 809855689013522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122793 and 20122802.

It is not a weakly prime, because it can be changed into another prime (20122829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061409 + 10061410.

It is an arithmetic number, because the mean of its divisors is an integer number (10061410).

Almost surely, 2^20122819 is an apocalyptic number.

20122819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122819 is an equidigital number, since it uses as much as digits as its factorization.

20122819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 20122819 is about 4485.8465198890. The cubic root of 20122819 is about 271.9962649069.

The spelling of 20122819 in words is "twenty million, one hundred twenty-two thousand, eight hundred nineteen".