20424605 has 8 divisors (see below), whose sum is σ = 24565464. Its totient is φ = 16302400.

The previous prime is 20424577. The next prime is 20424619. The reversal of 20424605 is 50642402.

It can be written as a sum of positive squares in 4 ways, for example, as 5938969 + 14485636 = 2437^2 + 3806^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20424605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (3070683).

Almost surely, 2^20424605 is an apocalyptic number.

It is an amenable number.

20424605 is a deficient number, since it is larger than the sum of its proper divisors (4140859).

20424605 is an equidigital number, since it uses as much as digits as its factorization.

20424605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9327.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20424605 is about 4519.3589147135. The cubic root of 20424605 is about 273.3492513368.

The spelling of 20424605 in words is "twenty million, four hundred twenty-four thousand, six hundred five".