20424267 has 24 divisors (see below), whose sum is σ = 30191616. Its totient is φ = 13302576.

The previous prime is 20424263. The next prime is 20424277. The reversal of 20424267 is 76242402.

It is a happy number.

It is not a de Polignac number, because 20424267 - 2² = 20424263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20424267.

It is not an unprimeable number, because it can be changed into a prime (20424263) 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, 122218 + ... + 122384.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^20424267 is an apocalyptic number.

20424267 is a deficient number, since it is larger than the sum of its proper divisors (9767349).

20424267 is a wasteful number, since it uses less digits than its factorization.

20424267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20424267 is about 4519.3215198744. The cubic root of 20424267 is about 273.3477434732.

Adding to 20424267 its reverse (76242402), we get a palindrome (96666669).

The spelling of 20424267 in words is "twenty million, four hundred twenty-four thousand, two hundred sixty-seven".