20564604213 has 16 divisors (see below), whose sum is σ = 27738848256. Its totient is φ = 13550423040.

The previous prime is 20564604173. The next prime is 20564604271. The reversal of 20564604213 is 31240646502.

It is not a de Polignac number, because 20564604213 - 2¹² = 20564600117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20564604293) 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, 175020 + ... + 267882.

It is an arithmetic number, because the mean of its divisors is an integer number (1733678016).

Almost surely, 2^20564604213 is an apocalyptic number.

It is an amenable number.

20564604213 is a deficient number, since it is larger than the sum of its proper divisors (7174244043).

20564604213 is an equidigital number, since it uses as much as digits as its factorization.

20564604213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93724.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20564604213 in words is "twenty billion, five hundred sixty-four million, six hundred four thousand, two hundred thirteen".