20252420 has 24 divisors (see below), whose sum is σ = 44380224. Its totient is φ = 7748576.

The previous prime is 20252381. The next prime is 20252447. The reversal of 20252420 is 2425202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21554 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (1849176).

Almost surely, 2^20252420 is an apocalyptic number.

20252420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20252420 is an abundant number, since it is smaller than the sum of its proper divisors (24127804).

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

20252420 is a wasteful number, since it uses less digits than its factorization.

20252420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44059 (or 44057 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20252420 is about 4500.2688808559. The cubic root of 20252420 is about 272.5789463487.

Adding to 20252420 its reverse (2425202), we get a palindrome (22677622).

The spelling of 20252420 in words is "twenty million, two hundred fifty-two thousand, four hundred twenty".