20218232 has 8 divisors (see below), whose sum is σ = 37909200. Its totient is φ = 10109112.

The previous prime is 20218193. The next prime is 20218259. The reversal of 20218232 is 23281202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263632 + ... + 1263647.

It is an arithmetic number, because the mean of its divisors is an integer number (4738650).

Almost surely, 2^20218232 is an apocalyptic number.

It is an amenable number.

20218232 is a deficient number, since it is larger than the sum of its proper divisors (17690968).

20218232 is a wasteful number, since it uses less digits than its factorization.

20218232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527285 (or 2527281 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20218232 is about 4496.4688367651. The cubic root of 20218232 is about 272.4254802825.

Adding to 20218232 its reverse (23281202), we get a palindrome (43499434).

The spelling of 20218232 in words is "twenty million, two hundred eighteen thousand, two hundred thirty-two".