20427232 has 24 divisors (see below), whose sum is σ = 45961776. Its totient is φ = 8754432.

The previous prime is 20427229. The next prime is 20427241. The reversal of 20427232 is 23272402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45373 + ... + 45820.

It is an arithmetic number, because the mean of its divisors is an integer number (1915074).

Almost surely, 2^20427232 is an apocalyptic number.

It is an amenable number.

20427232 is an abundant number, since it is smaller than the sum of its proper divisors (25534544).

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

20427232 is an equidigital number, since it uses as much as digits as its factorization.

20427232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91210 (or 91202 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20427232 is about 4519.6495439359. The cubic root of 20427232 is about 273.3609701714.

Adding to 20427232 its reverse (23272402), we get a palindrome (43699634).

It can be divided in two parts, 204272 and 32, that added together give a square (204304 = 452²).

The spelling of 20427232 in words is "twenty million, four hundred twenty-seven thousand, two hundred thirty-two".