20326420 has 24 divisors (see below), whose sum is σ = 43387848. Its totient is φ = 7996800.

The previous prime is 20326381. The next prime is 20326433. The reversal of 20326420 is 2462302.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 20322064 = 66^2 + 4508^2 .

It is a congruent number.

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, 7111 + ... + 9550.

It is an arithmetic number, because the mean of its divisors is an integer number (1807827).

Almost surely, 2^20326420 is an apocalyptic number.

20326420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20326420 is an abundant number, since it is smaller than the sum of its proper divisors (23061428).

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

20326420 is a wasteful number, since it uses less digits than its factorization.

20326420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16731 (or 16729 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20326420 is about 4508.4831151952. The cubic root of 20326420 is about 272.9105334623.

Adding to 20326420 its reverse (2462302), we get a palindrome (22788722).

The spelling of 20326420 in words is "twenty million, three hundred twenty-six thousand, four hundred twenty".