20323162425561 has 8 divisors (see below), whose sum is σ = 27135769296960. Its totient is φ = 13529665252272.

The previous prime is 20323162425547. The next prime is 20323162425641. The reversal of 20323162425561 is 16552426132302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20323162425561 - 2¹⁷ = 20323162294489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20323162425161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4777422045 + ... + 4777426298.

It is an arithmetic number, because the mean of its divisors is an integer number (3391971162120).

Almost surely, 2^{20323162425561} is an apocalyptic number.

It is an amenable number.

20323162425561 is a deficient number, since it is larger than the sum of its proper divisors (6812606871399).

20323162425561 is an equidigital number, since it uses as much as digits as its factorization.

20323162425561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554849055.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 20323162425561 its reverse (16552426132302), we get a palindrome (36875588557863).

The spelling of 20323162425561 in words is "twenty trillion, three hundred twenty-three billion, one hundred sixty-two million, four hundred twenty-five thousand, five hundred sixty-one".