20320572245 has 4 divisors (see below), whose sum is σ = 24384686700. Its totient is φ = 16256457792.

The previous prime is 20320572211. The next prime is 20320572271. The reversal of 20320572245 is 54227502302.

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 2968833169 + 17351739076 = 54487^2 + 131726^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320572245 - 2²² = 20316377941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032057220 + ... + 2032057229.

It is an arithmetic number, because the mean of its divisors is an integer number (6096171675).

Almost surely, 2^20320572245 is an apocalyptic number.

It is an amenable number.

20320572245 is a deficient number, since it is larger than the sum of its proper divisors (4064114455).

20320572245 is an equidigital number, since it uses as much as digits as its factorization.

20320572245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064114454.

The product of its (nonzero) digits is 33600, while the sum is 32.

It can be divided in two parts, 2032057 and 2245, that added together give a palindrome (2034302).

The spelling of 20320572245 in words is "twenty billion, three hundred twenty million, five hundred seventy-two thousand, two hundred forty-five".