20212550 has 12 divisors (see below), whose sum is σ = 37595436. Its totient is φ = 8085000.

The previous prime is 20212547. The next prime is 20212559. The reversal of 20212550 is 5521202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202076 + ... + 202175.

It is an arithmetic number, because the mean of its divisors is an integer number (3132953).

Almost surely, 2^20212550 is an apocalyptic number.

20212550 is a deficient number, since it is larger than the sum of its proper divisors (17382886).

20212550 is a wasteful number, since it uses less digits than its factorization.

20212550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404263 (or 404258 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20212550 is about 4495.8369632361. The cubic root of 20212550 is about 272.3999576650.

Adding to 20212550 its reverse (5521202), we get a palindrome (25733752).

The spelling of 20212550 in words is "twenty million, two hundred twelve thousand, five hundred fifty".