20424524 has 24 divisors (see below), whose sum is σ = 36612240. Its totient is φ = 9967104.

The previous prime is 20424517. The next prime is 20424533. The reversal of 20424524 is 42542402.

It is a super-2 number, since 2×20424524² = 834322361253152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20424524.

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, 32687 + ... + 33305.

It is an arithmetic number, because the mean of its divisors is an integer number (1525510).

Almost surely, 2^20424524 is an apocalyptic number.

It is an amenable number.

20424524 is a deficient number, since it is larger than the sum of its proper divisors (16187716).

20424524 is a wasteful number, since it uses less digits than its factorization.

20424524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20424524 is about 4519.3499532566. The cubic root of 20424524 is about 273.3488899864.

Adding to 20424524 its reverse (42542402), we get a palindrome (62966926).

The spelling of 20424524 in words is "twenty million, four hundred twenty-four thousand, five hundred twenty-four".