20187232 has 24 divisors (see below), whose sum is σ = 42801696. Its totient is φ = 9316992.

The previous prime is 20187229. The next prime is 20187259. The reversal of 20187232 is 23278102.

It is a junction number, because it is equal to n+sod(n) for n = 20187197 and 20187206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23848 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (1783404).

Almost surely, 2^20187232 is an apocalyptic number.

It is an amenable number.

20187232 is an abundant number, since it is smaller than the sum of its proper divisors (22614464).

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

20187232 is a wasteful number, since it uses less digits than its factorization.

20187232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48550 (or 48542 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20187232 is about 4493.0203649661. The cubic root of 20187232 is about 272.2861751606.

The spelling of 20187232 in words is "twenty million, one hundred eighty-seven thousand, two hundred thirty-two".