20424663 has 32 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 11445408.

The previous prime is 20424661. The next prime is 20424707. The reversal of 20424663 is 36642402.

It is not a de Polignac number, because 20424663 - 2¹ = 20424661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 8998 + ... + 11036.

It is an arithmetic number, because the mean of its divisors is an integer number (1101600).

Almost surely, 2^20424663 is an apocalyptic number.

20424663 is a deficient number, since it is larger than the sum of its proper divisors (14826537).

20424663 is a wasteful number, since it uses less digits than its factorization.

20424663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 20424663 is about 4519.3653315482. The cubic root of 20424663 is about 273.3495100810.

The spelling of 20424663 in words is "twenty million, four hundred twenty-four thousand, six hundred sixty-three".