20317932 has 48 divisors (see below), whose sum is σ = 53020800. Its totient is φ = 6728400.

The previous prime is 20317903. The next prime is 20317937. The reversal of 20317932 is 23971302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20317896 and 20317905.

It is not an unprimeable number, because it can be changed into a prime (20317937) 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, 18807 + ... + 19857.

It is an arithmetic number, because the mean of its divisors is an integer number (1104600).

Almost surely, 2^20317932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20317932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26510400).

20317932 is an abundant number, since it is smaller than the sum of its proper divisors (32702868).

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

20317932 is a wasteful number, since it uses less digits than its factorization.

20317932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20317932 is about 4507.5416803397. The cubic root of 20317932 is about 272.8725404279.

The spelling of 20317932 in words is "twenty million, three hundred seventeen thousand, nine hundred thirty-two".