20205032213 has 4 divisors (see below), whose sum is σ = 20222929740. Its totient is φ = 20187134688.

The previous prime is 20205032201. The next prime is 20205032233. The reversal of 20205032213 is 31223050202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3703574449 + 16501457764 = 60857^2 + 128458^2 .

It is a cyclic number.

It is not a de Polignac number, because 20205032213 - 2¹⁴ = 20205015829 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 (20205032233) 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, 8947070 + ... + 8949327.

It is an arithmetic number, because the mean of its divisors is an integer number (5055732435).

Almost surely, 2^20205032213 is an apocalyptic number.

It is an amenable number.

20205032213 is a deficient number, since it is larger than the sum of its proper divisors (17897527).

20205032213 is a wasteful number, since it uses less digits than its factorization.

20205032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17897526.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20205032213 its reverse (31223050202), we get a palindrome (51428082415).

The spelling of 20205032213 in words is "twenty billion, two hundred five million, thirty-two thousand, two hundred thirteen".