20424504 has 32 divisors (see below), whose sum is σ = 52027920. Its totient is φ = 6679296.

The previous prime is 20424493. The next prime is 20424511. The reversal of 20424504 is 40542402.

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, 6757 + ... + 9300.

Almost surely, 2^20424504 is an apocalyptic number.

20424504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20424504 is an abundant number, since it is smaller than the sum of its proper divisors (31603416).

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

20424504 is a wasteful number, since it uses less digits than its factorization.

20424504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16119 (or 16115 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 20424504 is about 4519.3477405484. The cubic root of 20424504 is about 273.3488007639.

Adding to 20424504 its reverse (40542402), we get a palindrome (60966906).

The spelling of 20424504 in words is "twenty million, four hundred twenty-four thousand, five hundred four".