20475375 has 16 divisors (see below), whose sum is σ = 34071648. Its totient is φ = 10920000.

The previous prime is 20475373. The next prime is 20475383. The reversal of 20475375 is 57357402.

It is not a de Polignac number, because 20475375 - 2¹ = 20475373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475373) 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, 26926 + ... + 27675.

It is an arithmetic number, because the mean of its divisors is an integer number (2129478).

Almost surely, 2^20475375 is an apocalyptic number.

20475375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20475375 is a deficient number, since it is larger than the sum of its proper divisors (13596273).

20475375 is an equidigital number, since it uses as much as digits as its factorization.

20475375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54619 (or 54609 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 20475375 is about 4524.9723756063. The cubic root of 20475375 is about 273.5755545043.

The spelling of 20475375 in words is "twenty million, four hundred seventy-five thousand, three hundred seventy-five".