20302272 has 112 divisors (see below), whose sum is σ = 61772800. Its totient is φ = 6531840.

The previous prime is 20302259. The next prime is 20302277. The reversal of 20302272 is 27220302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302277) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53379 + ... + 53757.

Almost surely, 2^20302272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20302272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30886400).

20302272 is an abundant number, since it is smaller than the sum of its proper divisors (41470528).

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

20302272 is a wasteful number, since it uses less digits than its factorization.

20302272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20302272 is about 4505.8042567338. The cubic root of 20302272 is about 272.8024171118.

Adding to 20302272 its reverse (27220302), we get a palindrome (47522574).

The spelling of 20302272 in words is "twenty million, three hundred two thousand, two hundred seventy-two".