20005132161 has 8 divisors (see below), whose sum is σ = 30484010944. Its totient is φ = 11431504080.

The previous prime is 20005132141. The next prime is 20005132163. The reversal of 20005132161 is 16123150002.

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

It is not a de Polignac number, because 20005132161 - 2⁹ = 20005131649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 952625341 = 20005132161 / (2 + 0 + 0 + 0 + 5 + 1 + 3 + 2 + 1 + 6 + 1).

It is the 141440-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20005132163) by changing a digit.

It is a nontrivial repunit in base 141439.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476312650 + ... + 476312691.

It is an arithmetic number, because the mean of its divisors is an integer number (3810501368).

Almost surely, 2^20005132161 is an apocalyptic number.

20005132161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20005132161 is a deficient number, since it is larger than the sum of its proper divisors (10478878783).

20005132161 is an equidigital number, since it uses as much as digits as its factorization.

20005132161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952625351.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20005132161 its reverse (16123150002), we get a palindrome (36128282163).

The spelling of 20005132161 in words is "twenty billion, five million, one hundred thirty-two thousand, one hundred sixty-one".