20609064 has 96 divisors (see below), whose sum is σ = 64571520. Its totient is φ = 5816448.

The previous prime is 20609041. The next prime is 20609089. The reversal of 20609064 is 46090602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51714 + ... + 52110.

It is an arithmetic number, because the mean of its divisors is an integer number (672620).

Almost surely, 2^20609064 is an apocalyptic number.

20609064 is a gapful number since it is divisible by the number (24) 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 20609064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32285760).

20609064 is an abundant number, since it is smaller than the sum of its proper divisors (43962456).

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

20609064 is a wasteful number, since it uses less digits than its factorization.

20609064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20609064 is about 4539.7206962543. The cubic root of 20609064 is about 274.1696784108.

Adding to 20609064 its reverse (46090602), we get a palindrome (66699666).

The spelling of 20609064 in words is "twenty million, six hundred nine thousand, sixty-four".