20575427 has 4 divisors (see below), whose sum is σ = 20596056. Its totient is φ = 20554800.

The previous prime is 20575403. The next prime is 20575433. The reversal of 20575427 is 72457502.

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 20575427 - 2⁸ = 20575171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20575393 and 20575402.

It is not an unprimeable number, because it can be changed into a prime (20575487) 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, 8738 + ... + 10839.

It is an arithmetic number, because the mean of its divisors is an integer number (5149014).

Almost surely, 2^20575427 is an apocalyptic number.

20575427 is a deficient number, since it is larger than the sum of its proper divisors (20629).

20575427 is a wasteful number, since it uses less digits than its factorization.

20575427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20628.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 20575427 is about 4536.0144400123. The cubic root of 20575427 is about 274.0204355440.

The spelling of 20575427 in words is "twenty million, five hundred seventy-five thousand, four hundred twenty-seven".