20924017 has 4 divisors (see below), whose sum is σ = 21003840. Its totient is φ = 20844196.

The previous prime is 20924011. The next prime is 20924021. The reversal of 20924017 is 71042902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20924017 is a prime.

It is a super-3 number, since 3×20924017³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20923982 and 20924000.

It is not an unprimeable number, because it can be changed into a prime (20924011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39517 + ... + 40042.

It is an arithmetic number, because the mean of its divisors is an integer number (5250960).

Almost surely, 2^20924017 is an apocalyptic number.

It is an amenable number.

20924017 is a deficient number, since it is larger than the sum of its proper divisors (79823).

20924017 is an equidigital number, since it uses as much as digits as its factorization.

20924017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79822.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20924017 is about 4574.2777571984. The cubic root of 20924017 is about 275.5592673569.

Adding to 20924017 its reverse (71042902), we get a palindrome (91966919).

The spelling of 20924017 in words is "twenty million, nine hundred twenty-four thousand, seventeen".