20423445342961 has 2 divisors, whose sum is σ = 20423445342962. Its totient is φ = 20423445342960.

The previous prime is 20423445342931. The next prime is 20423445343009. The reversal of 20423445342961 is 16924354432402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17509872870400 + 2913572472561 = 4184480^2 + 1706919^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423445342961 - 2⁵ = 20423445342929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20423445342901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211722671480 + 10211722671481.

It is an arithmetic number, because the mean of its divisors is an integer number (10211722671481).

Almost surely, 2^{20423445342961} is an apocalyptic number.

It is an amenable number.

20423445342961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423445342961 is an equidigital number, since it uses as much as digits as its factorization.

20423445342961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 20423445342961 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, three hundred forty-two thousand, nine hundred sixty-one".