20601601 has 8 divisors (see below), whose sum is σ = 21205184. Its totient is φ = 20003760.

The previous prime is 20601593. The next prime is 20601613. The reversal of 20601601 is 10610602.

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 20601601 - 2³ = 20601593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20601401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6460 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (2650648).

Almost surely, 2^20601601 is an apocalyptic number.

It is an amenable number.

20601601 is a deficient number, since it is larger than the sum of its proper divisors (603583).

20601601 is a wasteful number, since it uses less digits than its factorization.

20601601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20601601 is about 4538.8986549603. The cubic root of 20601601 is about 274.1365801044.

Subtracting from 20601601 its reverse (10610602), we obtain a palindrome (9990999).

The spelling of 20601601 in words is "twenty million, six hundred one thousand, six hundred one".