20326560 has 192 divisors, whose sum is σ = 70543872. Its totient is φ = 4898816.

The previous prime is 20326531. The next prime is 20326571. The reversal of 20326560 is 6562302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20326560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383494 + ... + 383546.

It is an arithmetic number, because the mean of its divisors is an integer number (367416).

Almost surely, 2^20326560 is an apocalyptic number.

20326560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20326560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35271936).

20326560 is an abundant number, since it is smaller than the sum of its proper divisors (50217312).

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

20326560 is a wasteful number, since it uses less digits than its factorization.

20326560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20326560 is about 4508.4986414548. The cubic root of 20326560 is about 272.9111600259.

Adding to 20326560 its reverse (6562302), we get a palindrome (26888862).

The spelling of 20326560 in words is "twenty million, three hundred twenty-six thousand, five hundred sixty".