20321272 has 16 divisors (see below), whose sum is σ = 38325240. Its totient is φ = 10101216.

The previous prime is 20321269. The next prime is 20321293. The reversal of 20321272 is 27212302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5958 + ... + 8725.

Almost surely, 2^20321272 is an apocalyptic number.

It is an amenable number.

20321272 is a deficient number, since it is larger than the sum of its proper divisors (18003968).

20321272 is a wasteful number, since it uses less digits than its factorization.

20321272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14862 (or 14858 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20321272 is about 4507.9121553109. The cubic root of 20321272 is about 272.8874918240.

Adding to 20321272 its reverse (27212302), we get a palindrome (47533574).

The spelling of 20321272 in words is "twenty million, three hundred twenty-one thousand, two hundred seventy-two".