20287212 has 48 divisors (see below), whose sum is σ = 54364800. Its totient is φ = 5823360.

The previous prime is 20287207. The next prime is 20287243. The reversal of 20287212 is 21278202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1537 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (1132600).

Almost surely, 2^20287212 is an apocalyptic number.

20287212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20287212 is an abundant number, since it is smaller than the sum of its proper divisors (34077588).

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

20287212 is a wasteful number, since it uses less digits than its factorization.

20287212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20287212 is about 4504.1327689135. The cubic root of 20287212 is about 272.7349464912.

It can be divided in two parts, 2028 and 7212, that multiplied together give a triangular number (14625936 = T₅₄₀₈).

The spelling of 20287212 in words is "twenty million, two hundred eighty-seven thousand, two hundred twelve".