20326680 has 256 divisors, whose sum is σ = 77760000. Its totient is φ = 4677120.

The previous prime is 20326667. The next prime is 20326681. The reversal of 20326680 is 8662302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20326681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 344491 + ... + 344549.

It is an arithmetic number, because the mean of its divisors is an integer number (303750).

Almost surely, 2^20326680 is an apocalyptic number.

20326680 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 20326680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38880000).

20326680 is an abundant number, since it is smaller than the sum of its proper divisors (57433320).

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

20326680 is a wasteful number, since it uses less digits than its factorization.

20326680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20326680 is about 4508.5119496348. The cubic root of 20326680 is about 272.9116970782.

Adding to 20326680 its reverse (8662302), we get a palindrome (28988982).

The spelling of 20326680 in words is "twenty million, three hundred twenty-six thousand, six hundred eighty".