20007408161 has 8 divisors (see below), whose sum is σ = 21747809664. Its totient is φ = 18295773840.

The previous prime is 20007408119. The next prime is 20007408193. The reversal of 20007408161 is 16180470002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20007408161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007408961) 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, 7190345 + ... + 7193126.

It is an arithmetic number, because the mean of its divisors is an integer number (2718476208).

Almost surely, 2^20007408161 is an apocalyptic number.

It is an amenable number.

20007408161 is a deficient number, since it is larger than the sum of its proper divisors (1740401503).

20007408161 is a wasteful number, since it uses less digits than its factorization.

20007408161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14383591.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 20007408161 its reverse (16180470002), we get a palindrome (36187878163).

The spelling of 20007408161 in words is "twenty billion, seven million, four hundred eight thousand, one hundred sixty-one".