20345004406065 has 16 divisors (see below), whose sum is σ = 32558152543488. Its totient is φ = 10848620518656.

The previous prime is 20345004406061. The next prime is 20345004406081. The reversal of 20345004406065 is 56060440054302.

It is not a de Polignac number, because 20345004406065 - 2² = 20345004406061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20345004406061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127949017 + ... + 128107926.

It is an arithmetic number, because the mean of its divisors is an integer number (2034884533968).

Almost surely, 2^{20345004406065} is an apocalyptic number.

It is an amenable number.

20345004406065 is a deficient number, since it is larger than the sum of its proper divisors (12213148137423).

20345004406065 is a wasteful number, since it uses less digits than its factorization.

20345004406065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256062248.

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 20345004406065 in words is "twenty trillion, three hundred forty-five billion, four million, four hundred six thousand, sixty-five".