20230236161 has 4 divisors (see below), whose sum is σ = 20260842324. Its totient is φ = 20199630000.

The previous prime is 20230236119. The next prime is 20230236167. The reversal of 20230236161 is 16163203202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16163203202 = 2 ⋅8081601601.

It can be written as a sum of positive squares in 2 ways, for example, as 11546791936 + 8683444225 = 107456^2 + 93185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20230236161 - 2⁶ = 20230236097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20230236161.

It is not an unprimeable number, because it can be changed into a prime (20230236167) 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, 15302090 + ... + 15303411.

It is an arithmetic number, because the mean of its divisors is an integer number (5065210581).

Almost surely, 2^20230236161 is an apocalyptic number.

It is an amenable number.

20230236161 is a deficient number, since it is larger than the sum of its proper divisors (30606163).

20230236161 is an equidigital number, since it uses as much as digits as its factorization.

20230236161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30606162.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20230236161 its reverse (16163203202), we get a palindrome (36393439363).

The spelling of 20230236161 in words is "twenty billion, two hundred thirty million, two hundred thirty-six thousand, one hundred sixty-one".