20326688 has 18 divisors (see below), whose sum is σ = 40068441. Its totient is φ = 10150592.

The previous prime is 20326681. The next prime is 20326699. The reversal of 20326688 is 88662302.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 20322064 + 4624 = 4508^2 + 68^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3188.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 25106 + ... + 25902.

Almost surely, 2^20326688 is an apocalyptic number.

It is an amenable number.

20326688 is a deficient number, since it is larger than the sum of its proper divisors (19741753).

20326688 is an frugal number, since it uses more digits than its factorization.

20326688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 20326688 is about 4508.5128368454. The cubic root of 20326688 is about 272.9117328816.

The spelling of 20326688 in words is "twenty million, three hundred twenty-six thousand, six hundred eighty-eight".