20601215 has 16 divisors (see below), whose sum is σ = 25920000. Its totient is φ = 15688992.

The previous prime is 20601211. The next prime is 20601233. The reversal of 20601215 is 51210602.

It is a cyclic number.

It is not a de Polignac number, because 20601215 - 2² = 20601211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20601193 and 20601202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601211) 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, 41036 + ... + 41534.

It is an arithmetic number, because the mean of its divisors is an integer number (1620000).

Almost surely, 2^20601215 is an apocalyptic number.

20601215 is a deficient number, since it is larger than the sum of its proper divisors (5318785).

20601215 is a wasteful number, since it uses less digits than its factorization.

20601215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20601215 is about 4538.8561334327. The cubic root of 20601215 is about 274.1348679821.

Adding to 20601215 its reverse (51210602), we get a palindrome (71811817).

The spelling of 20601215 in words is "twenty million, six hundred one thousand, two hundred fifteen".