20424475 has 12 divisors (see below), whose sum is σ = 25397680. Its totient is φ = 16293600.

The previous prime is 20424431. The next prime is 20424491. The reversal of 20424475 is 57442402.

It is a happy number.

It is not a de Polignac number, because 20424475 - 2¹¹ = 20422427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10045 + ... + 11905.

Almost surely, 2^20424475 is an apocalyptic number.

20424475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20424475 is a deficient number, since it is larger than the sum of its proper divisors (4973205).

20424475 is a wasteful number, since it uses less digits than its factorization.

20424475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 20424475 is about 4519.3445321197. The cubic root of 20424475 is about 273.3486713913.

Adding to 20424475 its reverse (57442402), we get a palindrome (77866877).

The spelling of 20424475 in words is "twenty million, four hundred twenty-four thousand, four hundred seventy-five".