20601156 has 24 divisors (see below), whose sum is σ = 49369600. Its totient is φ = 6681312.

The previous prime is 20601079. The next prime is 20601157. The reversal of 20601156 is 65110602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20601157) 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, 22756 + ... + 23643.

Almost surely, 2^20601156 is an apocalyptic number.

It is an amenable number.

20601156 is an abundant number, since it is smaller than the sum of its proper divisors (28768444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20601156 is a wasteful number, since it uses less digits than its factorization.

20601156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46443 (or 46441 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20601156 is about 4538.8496339932. The cubic root of 20601156 is about 274.1346062828.

Adding to 20601156 its reverse (65110602), we get a palindrome (85711758).

The spelling of 20601156 in words is "twenty million, six hundred one thousand, one hundred fifty-six".