20401034161 has 16 divisors (see below), whose sum is σ = 21682987200. Its totient is φ = 19128322048.

The previous prime is 20401034117. The next prime is 20401034221. The reversal of 20401034161 is 16143010402.

It is a cyclic number.

It is not a de Polignac number, because 20401034161 - 2²⁷ = 20266816433 is a prime.

It is a super-3 number, since 3×20401034161³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401134161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6615726 + ... + 6618808.

It is an arithmetic number, because the mean of its divisors is an integer number (1355186700).

Almost surely, 2^20401034161 is an apocalyptic number.

It is an amenable number.

20401034161 is a deficient number, since it is larger than the sum of its proper divisors (1281953039).

20401034161 is a wasteful number, since it uses less digits than its factorization.

20401034161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20401034161 its reverse (16143010402), we get a palindrome (36544044563).

It can be divided in two parts, 204010341 and 61, that added together give a palindrome (204010402).

The spelling of 20401034161 in words is "twenty billion, four hundred one million, thirty-four thousand, one hundred sixty-one".