20303072 has 12 divisors (see below), whose sum is σ = 39971736. Its totient is φ = 10151520.

The previous prime is 20303071. The next prime is 20303111. The reversal of 20303072 is 27030302.

It is a self number, because there is not a number n which added to its sum of digits gives 20303072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317204 + ... + 317267.

It is an arithmetic number, because the mean of its divisors is an integer number (3330978).

Almost surely, 2^20303072 is an apocalyptic number.

It is an amenable number.

20303072 is a deficient number, since it is larger than the sum of its proper divisors (19668664).

20303072 is an equidigital number, since it uses as much as digits as its factorization.

20303072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634481 (or 634473 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 20303072 is about 4505.8930302438. The cubic root of 20303072 is about 272.8060002751.

Adding to 20303072 its reverse (27030302), we get a palindrome (47333374).

The spelling of 20303072 in words is "twenty million, three hundred three thousand, seventy-two".