20345513275265 has 64 divisors (see below), whose sum is σ = 27128580264000. Its totient is φ = 14577319378944.

The previous prime is 20345513275229. The next prime is 20345513275277. The reversal of 20345513275265 is 56257231554302.

It can be written as a sum of positive squares in 32 ways, for example, as 976721077264 + 19368792198001 = 988292^2 + 4400999^2 .

It is not a de Polignac number, because 20345513275265 - 2¹⁰ = 20345513274241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247023311 + ... + 247105659.

It is an arithmetic number, because the mean of its divisors is an integer number (423884066625).

Almost surely, 2^{20345513275265} is an apocalyptic number.

It is an amenable number.

20345513275265 is a deficient number, since it is larger than the sum of its proper divisors (6783066988735).

20345513275265 is a wasteful number, since it uses less digits than its factorization.

20345513275265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83846.

The product of its (nonzero) digits is 7560000, while the sum is 50.

The spelling of 20345513275265 in words is "twenty trillion, three hundred forty-five billion, five hundred thirteen million, two hundred seventy-five thousand, two hundred sixty-five".