20628303 has 4 divisors (see below), whose sum is σ = 27504408. Its totient is φ = 13752200.

The previous prime is 20628287. The next prime is 20628313. The reversal of 20628303 is 30382602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20628303 - 2⁴ = 20628287 is a prime.

It is a super-3 number, since 3×20628303³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3438048 + ... + 3438053.

It is an arithmetic number, because the mean of its divisors is an integer number (6876102).

Almost surely, 2^20628303 is an apocalyptic number.

20628303 is a deficient number, since it is larger than the sum of its proper divisors (6876105).

20628303 is an equidigital number, since it uses as much as digits as its factorization.

20628303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876104.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20628303 is about 4541.8391649199. The cubic root of 20628303 is about 274.2549662875.

The spelling of 20628303 in words is "twenty million, six hundred twenty-eight thousand, three hundred three".