20601245 has 16 divisors (see below), whose sum is σ = 28522368. Its totient is φ = 13992000.

The previous prime is 20601241. The next prime is 20601247. The reversal of 20601245 is 54210602.

It is a happy number.

It is not a de Polignac number, because 20601245 - 2² = 20601241 is a prime.

It is a super-2 number, since 2×20601245² = 848822591100050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (1782648).

Almost surely, 2^20601245 is an apocalyptic number.

It is an amenable number.

20601245 is a deficient number, since it is larger than the sum of its proper divisors (7921123).

20601245 is a wasteful number, since it uses less digits than its factorization.

20601245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20601245 is about 4538.8594382289. The cubic root of 20601245 is about 274.1350010494.

Adding to 20601245 its reverse (54210602), we get a palindrome (74811847).

The spelling of 20601245 in words is "twenty million, six hundred one thousand, two hundred forty-five".