20565007 has 8 divisors (see below), whose sum is σ = 21521376. Its totient is φ = 19629792.

The previous prime is 20565001. The next prime is 20565073. The reversal of 20565007 is 70056502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20565007 - 2²³ = 12176399 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 (20565001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3283 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (2690172).

Almost surely, 2^20565007 is an apocalyptic number.

20565007 is a deficient number, since it is larger than the sum of its proper divisors (956369).

20565007 is a wasteful number, since it uses less digits than its factorization.

20565007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10577.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20565007 is about 4534.8657091473. The cubic root of 20565007 is about 273.9741704033.

The spelling of 20565007 in words is "twenty million, five hundred sixty-five thousand, seven".