20424670 has 48 divisors (see below), whose sum is σ = 43428528. Its totient is φ = 6894720.

The previous prime is 20424661. The next prime is 20424707. The reversal of 20424670 is 7642402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35485 + ... + 36055.

It is an arithmetic number, because the mean of its divisors is an integer number (904761).

Almost surely, 2^20424670 is an apocalyptic number.

20424670 is an abundant number, since it is smaller than the sum of its proper divisors (23003858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20424670 is a wasteful number, since it uses less digits than its factorization.

20424670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20424670 is about 4519.3661059932. The cubic root of 20424670 is about 273.3495413087.

The spelling of 20424670 in words is "twenty million, four hundred twenty-four thousand, six hundred seventy".