20611362161 has 8 divisors (see below), whose sum is σ = 22254812160. Its totient is φ = 18976192272.

The previous prime is 20611362131. The next prime is 20611362217. The reversal of 20611362161 is 16126311602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20611362161 - 2⁶ = 20611362097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20611362131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2064851 + ... + 2074808.

It is an arithmetic number, because the mean of its divisors is an integer number (2781851520).

Almost surely, 2^20611362161 is an apocalyptic number.

It is an amenable number.

20611362161 is a deficient number, since it is larger than the sum of its proper divisors (1643449999).

20611362161 is a wasteful number, since it uses less digits than its factorization.

20611362161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140055.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 20611362161 its reverse (16126311602), we get a palindrome (36737673763).

The spelling of 20611362161 in words is "twenty billion, six hundred eleven million, three hundred sixty-two thousand, one hundred sixty-one".