20727212 has 12 divisors (see below), whose sum is σ = 39570216. Its totient is φ = 9421440.

The previous prime is 20727193. The next prime is 20727227. The reversal of 20727212 is 21272702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235493 + ... + 235580.

It is an arithmetic number, because the mean of its divisors is an integer number (3297518).

Almost surely, 2^20727212 is an apocalyptic number.

20727212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20727212 is a deficient number, since it is larger than the sum of its proper divisors (18843004).

20727212 is a wasteful number, since it uses less digits than its factorization.

20727212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471088 (or 471086 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20727212 is about 4552.7147944935. The cubic root of 20727212 is about 274.6926019697.

Adding to 20727212 its reverse (21272702), we get a palindrome (41999914).

Subtracting 20727212 from its reverse (21272702), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 20727212 in words is "twenty million, seven hundred twenty-seven thousand, two hundred twelve".