20471232 has 28 divisors (see below), whose sum is σ = 54163976. Its totient is φ = 6823680.

The previous prime is 20471201. The next prime is 20471233. The reversal of 20471232 is 23217402.

It is a hoax number, since the sum of its digits (21) 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 = 20471199 and 20471208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471233) 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, 53119 + ... + 53502.

Almost surely, 2^20471232 is an apocalyptic number.

It is an amenable number.

20471232 is an abundant number, since it is smaller than the sum of its proper divisors (33692744).

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

20471232 is a wasteful number, since it uses less digits than its factorization.

20471232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106636 (or 106626 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20471232 is about 4524.5145595964. The cubic root of 20471232 is about 273.5571014442.

Adding to 20471232 its reverse (23217402), we get a palindrome (43688634).

The spelling of 20471232 in words is "twenty million, four hundred seventy-one thousand, two hundred thirty-two".