20317192 has 32 divisors (see below), whose sum is σ = 43686720. Its totient is φ = 8677440.

The previous prime is 20317177. The next prime is 20317223. The reversal of 20317192 is 29171302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25423 + ... + 26209.

It is an arithmetic number, because the mean of its divisors is an integer number (1365210).

Almost surely, 2^20317192 is an apocalyptic number.

It is an amenable number.

20317192 is an abundant number, since it is smaller than the sum of its proper divisors (23369528).

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

20317192 is a wasteful number, since it uses less digits than its factorization.

20317192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20317192 is about 4507.4595949382. The cubic root of 20317192 is about 272.8692276214.

Adding to 20317192 its reverse (29171302), we get a palindrome (49488494).

The spelling of 20317192 in words is "twenty million, three hundred seventeen thousand, one hundred ninety-two".