20233454161 has 2 divisors, whose sum is σ = 20233454162. Its totient is φ = 20233454160.

The previous prime is 20233454149. The next prime is 20233454183. The reversal of 20233454161 is 16145433202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19615683136 + 617771025 = 140056^2 + 24855^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233454161 - 2¹⁵ = 20233421393 is a prime.

It is not a weakly prime, because it can be changed into another prime (20233454191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116727080 + 10116727081.

It is an arithmetic number, because the mean of its divisors is an integer number (10116727081).

Almost surely, 2^20233454161 is an apocalyptic number.

It is an amenable number.

20233454161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233454161 is an equidigital number, since it uses as much as digits as its factorization.

20233454161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 20233454161 its reverse (16145433202), we get a palindrome (36378887363).

The spelling of 20233454161 in words is "twenty billion, two hundred thirty-three million, four hundred fifty-four thousand, one hundred sixty-one".