20424210 has 32 divisors (see below), whose sum is σ = 49401792. Its totient is φ = 5403840.

The previous prime is 20424199. The next prime is 20424247. The reversal of 20424210 is 1242402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20424210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1332 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1543806).

Almost surely, 2^20424210 is an apocalyptic number.

20424210 is an abundant number, since it is smaller than the sum of its proper divisors (28977582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20424210 is a wasteful number, since it uses less digits than its factorization.

20424210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20424210 is about 4519.3152136137. The cubic root of 20424210 is about 273.3474891869.

Adding to 20424210 its reverse (1242402), we get a palindrome (21666612).

The spelling of 20424210 in words is "twenty million, four hundred twenty-four thousand, two hundred ten".