20424437 has 24 divisors (see below), whose sum is σ = 24131520. Its totient is φ = 17230400.

The previous prime is 20424431. The next prime is 20424491. The reversal of 20424437 is 73442402.

It is not a de Polignac number, because 20424437 - 2⁴ = 20424421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114014 + ... + 114192.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^20424437 is an apocalyptic number.

It is an amenable number.

20424437 is a deficient number, since it is larger than the sum of its proper divisors (3707083).

20424437 is a wasteful number, since it uses less digits than its factorization.

20424437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 20424437 is about 4519.3403279682. The cubic root of 20424437 is about 273.3485018682.

Adding to 20424437 its reverse (73442402), we get a palindrome (93866839).

The spelling of 20424437 in words is "twenty million, four hundred twenty-four thousand, four hundred thirty-seven".