20124619 has 2 divisors, whose sum is σ = 20124620. Its totient is φ = 20124618.

The previous prime is 20124593. The next prime is 20124623. The reversal of 20124619 is 91642102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20124619 - 2⁷ = 20124491 is a prime.

It is a super-2 number, since 2×20124619² = 810000579790322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20124593 and 20124602.

It is not a weakly prime, because it can be changed into another prime (20124649) 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, 10062309 + 10062310.

It is an arithmetic number, because the mean of its divisors is an integer number (10062310).

Almost surely, 2^20124619 is an apocalyptic number.

20124619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124619 is an equidigital number, since it uses as much as digits as its factorization.

20124619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20124619 is about 4486.0471464308. The cubic root of 20124619 is about 272.0043747494.

The spelling of 20124619 in words is "twenty million, one hundred twenty-four thousand, six hundred nineteen".