20601013 has 8 divisors (see below), whose sum is σ = 20861208. Its totient is φ = 20342784.

The previous prime is 20600977. The next prime is 20601023. The reversal of 20601013 is 31010602.

It can be written as a sum of positive squares in 4 ways, for example, as 736164 + 19864849 = 858^2 + 4457^2 .

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 20601013 - 2⁹ = 20600501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20600984 and 20601002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33081 + ... + 33697.

It is an arithmetic number, because the mean of its divisors is an integer number (2607651).

Almost surely, 2^20601013 is an apocalyptic number.

It is an amenable number.

20601013 is a deficient number, since it is larger than the sum of its proper divisors (260195).

20601013 is a wasteful number, since it uses less digits than its factorization.

20601013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20601013 is about 4538.8338810756. The cubic root of 20601013 is about 274.1339719925.

Adding to 20601013 its reverse (31010602), we get a palindrome (51611615).

The spelling of 20601013 in words is "twenty million, six hundred one thousand, thirteen".