20424056 has 16 divisors (see below), whose sum is σ = 38399400. Its totient is φ = 10184224.

The previous prime is 20424049. The next prime is 20424067. The reversal of 20424056 is 65042402.

It is a super-2 number, since 2×20424056² = 834284126982272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 6393.

Almost surely, 2^20424056 is an apocalyptic number.

It is an amenable number.

20424056 is a deficient number, since it is larger than the sum of its proper divisors (17975344).

20424056 is a wasteful number, since it uses less digits than its factorization.

20424056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958 (or 6954 counting only the distinct ones).

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

The square root of 20424056 is about 4519.2981756020. The cubic root of 20424056 is about 273.3468021653.

Adding to 20424056 its reverse (65042402), we get a palindrome (85466458).

The spelling of 20424056 in words is "twenty million, four hundred twenty-four thousand, fifty-six".