20505232 has 20 divisors (see below), whose sum is σ = 43340976. Its totient is φ = 9320480.

The previous prime is 20505227. The next prime is 20505239. The reversal of 20505232 is 23250502.

It is not an unprimeable number, because it can be changed into a prime (20505239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58078 + ... + 58429.

Almost surely, 2^20505232 is an apocalyptic number.

20505232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20505232 is an abundant number, since it is smaller than the sum of its proper divisors (22835744).

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

20505232 is a wasteful number, since it uses less digits than its factorization.

20505232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116526 (or 116520 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20505232 is about 4528.2703099528. The cubic root of 20505232 is about 273.7084650258.

Adding to 20505232 its reverse (23250502), we get a palindrome (43755734).

The spelling of 20505232 in words is "twenty million, five hundred five thousand, two hundred thirty-two".