20013232 has 40 divisors (see below), whose sum is σ = 41792960. Its totient is φ = 9253440.

The previous prime is 20013223. The next prime is 20013239. The reversal of 20013232 is 23231002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20013239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12307 + ... + 13837.

It is an arithmetic number, because the mean of its divisors is an integer number (1044824).

Almost surely, 2^20013232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20013232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20896480).

20013232 is an abundant number, since it is smaller than the sum of its proper divisors (21779728).

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

20013232 is a wasteful number, since it uses less digits than its factorization.

20013232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20013232 is about 4473.6150929645. The cubic root of 20013232 is about 271.5016104193.

Adding to 20013232 its reverse (23231002), we get a palindrome (43244234).

The spelling of 20013232 in words is "twenty million, thirteen thousand, two hundred thirty-two".