20345632 has 12 divisors (see below), whose sum is σ = 40055526. Its totient is φ = 10172800.

The previous prime is 20345629. The next prime is 20345659. The reversal of 20345632 is 23654302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18696976 + 1648656 = 4324^2 + 1284^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20345597 and 20345606.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 317869 + ... + 317932.

Almost surely, 2^20345632 is an apocalyptic number.

It is an amenable number.

20345632 is a deficient number, since it is larger than the sum of its proper divisors (19709894).

20345632 is an equidigital number, since it uses as much as digits as its factorization.

20345632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635811 (or 635803 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20345632 is about 4510.6132620742. The cubic root of 20345632 is about 272.9964890173.

Adding to 20345632 its reverse (23654302), we get a palindrome (43999934).

The spelling of 20345632 in words is "twenty million, three hundred forty-five thousand, six hundred thirty-two".