20122519 has 2 divisors, whose sum is σ = 20122520. Its totient is φ = 20122518.

The previous prime is 20122511. The next prime is 20122541. The reversal of 20122519 is 91522102.

It is an a-pointer prime, because the next prime (20122541) can be obtained adding 20122519 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20122519 - 2³ = 20122511 is a prime.

It is a super-2 number, since 2×20122519² = 809831541810722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122511) 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 as a sum of consecutive naturals, namely, 10061259 + 10061260.

It is an arithmetic number, because the mean of its divisors is an integer number (10061260).

Almost surely, 2^20122519 is an apocalyptic number.

20122519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122519 is an equidigital number, since it uses as much as digits as its factorization.

20122519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20122519 is about 4485.8130812596. The cubic root of 20122519 is about 271.9949132195.

The spelling of 20122519 in words is "twenty million, one hundred twenty-two thousand, five hundred nineteen".