20717152 has 24 divisors (see below), whose sum is σ = 43187256. Its totient is φ = 9748992.

The previous prime is 20717149. The next prime is 20717159. The reversal of 20717152 is 25171702.

It is a happy number.

It is a super-2 number, since 2×20717152² = 858400773982208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717159) 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 3 ways as a sum of consecutive naturals, for example, 18498 + ... + 19585.

It is an arithmetic number, because the mean of its divisors is an integer number (1799469).

Almost surely, 2^20717152 is an apocalyptic number.

It is an amenable number.

20717152 is an abundant number, since it is smaller than the sum of its proper divisors (22470104).

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

20717152 is a wasteful number, since it uses less digits than its factorization.

20717152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38110 (or 38102 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 20717152 is about 4551.6098251058. The cubic root of 20717152 is about 274.6481538826.

Adding to 20717152 its reverse (25171702), we get a palindrome (45888854).

The spelling of 20717152 in words is "twenty million, seven hundred seventeen thousand, one hundred fifty-two".