20345232 has 20 divisors (see below), whose sum is σ = 52558640. Its totient is φ = 6781728.

The previous prime is 20345231. The next prime is 20345233. The reversal of 20345232 is 23254302.

It is an interprime number because it is at equal distance from previous prime (20345231) and next prime (20345233).

It is a junction number, because it is equal to n+sod(n) for n = 20345199 and 20345208.

It is not an unprimeable number, because it can be changed into a prime (20345231) 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, 211882 + ... + 211977.

It is an arithmetic number, because the mean of its divisors is an integer number (2627932).

Almost surely, 2^20345232 is an apocalyptic number.

It is an amenable number.

20345232 is an abundant number, since it is smaller than the sum of its proper divisors (32213408).

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

20345232 is a wasteful number, since it uses less digits than its factorization.

20345232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423870 (or 423864 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20345232 is about 4510.5689219876. The cubic root of 20345232 is about 272.9946999467.

Adding to 20345232 its reverse (23254302), we get a palindrome (43599534).

The spelling of 20345232 in words is "twenty million, three hundred forty-five thousand, two hundred thirty-two".