20357630245 has 4 divisors (see below), whose sum is σ = 24429156300. Its totient is φ = 16286104192.

The previous prime is 20357630207. The next prime is 20357630299. The reversal of 20357630245 is 54203675302.

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 15835202244 + 4522428001 = 125838^2 + 67249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20357630245 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035763020 + ... + 2035763029.

It is an arithmetic number, because the mean of its divisors is an integer number (6107289075).

Almost surely, 2^20357630245 is an apocalyptic number.

It is an amenable number.

20357630245 is a deficient number, since it is larger than the sum of its proper divisors (4071526055).

20357630245 is an equidigital number, since it uses as much as digits as its factorization.

20357630245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071526054.

The product of its (nonzero) digits is 151200, while the sum is 37.

The spelling of 20357630245 in words is "twenty billion, three hundred fifty-seven million, six hundred thirty thousand, two hundred forty-five".