20601021970169 has 2 divisors, whose sum is σ = 20601021970170. Its totient is φ = 20601021970168.

The previous prime is 20601021970117. The next prime is 20601021970219. The reversal of 20601021970169 is 96107912010602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16469701490944 + 4131320479225 = 4058288^2 + 2032565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20601021970169 is a prime.

It is a super-2 number, since 2×20601021970169² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20601021970369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300510985084 + 10300510985085.

It is an arithmetic number, because the mean of its divisors is an integer number (10300510985085).

Almost surely, 2^{20601021970169} is an apocalyptic number.

It is an amenable number.

20601021970169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20601021970169 is an equidigital number, since it uses as much as digits as its factorization.

20601021970169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 20601021970169 in words is "twenty trillion, six hundred one billion, twenty-one million, nine hundred seventy thousand, one hundred sixty-nine".