20153323161 has 24 divisors (see below), whose sum is σ = 30724728320. Its totient is φ = 12694250016.

The previous prime is 20153323139. The next prime is 20153323163. The reversal of 20153323161 is 16132335102.

20153323161 is a `hidden beast` number, since 2 + 0 + 15 + 332 + 316 + 1 = 666.

It is not a de Polignac number, because 20153323161 - 2¹⁹ = 20152798873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20153323163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94201 + ... + 221766.

Almost surely, 2^20153323161 is an apocalyptic number.

It is an amenable number.

20153323161 is a deficient number, since it is larger than the sum of its proper divisors (10571405159).

20153323161 is a wasteful number, since it uses less digits than its factorization.

20153323161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316365 (or 316362 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 20153323161 its reverse (16132335102), we get a palindrome (36285658263).

The spelling of 20153323161 in words is "twenty billion, one hundred fifty-three million, three hundred twenty-three thousand, one hundred sixty-one".