20475223 has 4 divisors (see below), whose sum is σ = 20493088. Its totient is φ = 20457360.

The previous prime is 20475197. The next prime is 20475253. The reversal of 20475223 is 32257402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20475223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475253) 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, 7086 + ... + 9547.

It is an arithmetic number, because the mean of its divisors is an integer number (5123272).

Almost surely, 2^20475223 is an apocalyptic number.

20475223 is a deficient number, since it is larger than the sum of its proper divisors (17865).

20475223 is a wasteful number, since it uses less digits than its factorization.

20475223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17864.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20475223 is about 4524.9555798925. The cubic root of 20475223 is about 273.5748775352.

The spelling of 20475223 in words is "twenty million, four hundred seventy-five thousand, two hundred twenty-three".