20295563342161 has 4 divisors (see below), whose sum is σ = 20295579009024. Its totient is φ = 20295547675300.

The previous prime is 20295563342051. The next prime is 20295563342167. The reversal of 20295563342161 is 16124336559202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20295563342161 - 2¹¹ = 20295563340113 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20295563342167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5695825 + ... + 8545966.

It is an arithmetic number, because the mean of its divisors is an integer number (5073894752256).

Almost surely, 2^{20295563342161} is an apocalyptic number.

It is an amenable number.

20295563342161 is a deficient number, since it is larger than the sum of its proper divisors (15666863).

20295563342161 is a wasteful number, since it uses less digits than its factorization.

20295563342161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15666862.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 20295563342161 in words is "twenty trillion, two hundred ninety-five billion, five hundred sixty-three million, three hundred forty-two thousand, one hundred sixty-one".