20628375 has 16 divisors (see below), whose sum is σ = 34326240. Its totient is φ = 11001600.

The previous prime is 20628373. The next prime is 20628379. The reversal of 20628375 is 57382602.

It is not a de Polignac number, because 20628375 - 2¹ = 20628373 is a prime.

It is a super-3 number, since 3×20628375³ (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 (20628373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27130 + ... + 27879.

It is an arithmetic number, because the mean of its divisors is an integer number (2145390).

Almost surely, 2^20628375 is an apocalyptic number.

20628375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20628375 is a deficient number, since it is larger than the sum of its proper divisors (13697865).

20628375 is an equidigital number, since it uses as much as digits as its factorization.

20628375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55027 (or 55017 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20628375 is about 4541.8470912174. The cubic root of 20628375 is about 274.2552853691.

The spelling of 20628375 in words is "twenty million, six hundred twenty-eight thousand, three hundred seventy-five".