20124017 has 4 divisors (see below), whose sum is σ = 20135076. Its totient is φ = 20112960.

The previous prime is 20124007. The next prime is 20124023. The reversal of 20124017 is 71042102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4999696 + 15124321 = 2236^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124017 - 2²² = 15929713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123986 and 20124004.

It is not an unprimeable number, because it can be changed into a prime (20124007) 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 in 3 ways as a sum of consecutive naturals, for example, 2084 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (5033769).

Almost surely, 2^20124017 is an apocalyptic number.

It is an amenable number.

20124017 is a deficient number, since it is larger than the sum of its proper divisors (11059).

20124017 is an equidigital number, since it uses as much as digits as its factorization.

20124017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20124017 is about 4485.9800489971. The cubic root of 20124017 is about 272.0016625115.

Adding to 20124017 its reverse (71042102), we get a palindrome (91166119).

The spelling of 20124017 in words is "twenty million, one hundred twenty-four thousand, seventeen".