20477244265 has 4 divisors (see below), whose sum is σ = 24572693124. Its totient is φ = 16381795408.

The previous prime is 20477244233. The next prime is 20477244289. The reversal of 20477244265 is 56244277402.

It is a happy number.

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 2526871824 + 17950372441 = 50268^2 + 133979^2 .

It is a cyclic number.

It is not a de Polignac number, because 20477244265 - 2⁵ = 20477244233 is a prime.

It is a Duffinian 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, 2047724422 + ... + 2047724431.

It is an arithmetic number, because the mean of its divisors is an integer number (6143173281).

Almost surely, 2^20477244265 is an apocalyptic number.

It is an amenable number.

20477244265 is a deficient number, since it is larger than the sum of its proper divisors (4095448859).

20477244265 is an equidigital number, since it uses as much as digits as its factorization.

20477244265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095448858.

The product of its (nonzero) digits is 752640, while the sum is 43.

The spelling of 20477244265 in words is "twenty billion, four hundred seventy-seven million, two hundred forty-four thousand, two hundred sixty-five".