20564007 has 8 divisors (see below), whose sum is σ = 27444720. Its totient is φ = 13696320.

The previous prime is 20563981. The next prime is 20564021. The reversal of 20564007 is 70046502.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20564007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20564087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (3430590).

Almost surely, 2^20564007 is an apocalyptic number.

20564007 is a deficient number, since it is larger than the sum of its proper divisors (6880713).

20564007 is a wasteful number, since it uses less digits than its factorization.

20564007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20564007 is about 4534.7554509587. The cubic root of 20564007 is about 273.9697295489.

The spelling of 20564007 in words is "twenty million, five hundred sixty-four thousand, seven".