20771252 has 6 divisors (see below), whose sum is σ = 36349698. Its totient is φ = 10385624.

The previous prime is 20771213. The next prime is 20771269. The reversal of 20771252 is 25217702.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 376996 = 4516^2 + 614^2 .

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, 2596403 + ... + 2596410.

It is an arithmetic number, because the mean of its divisors is an integer number (6058283).

Almost surely, 2^20771252 is an apocalyptic number.

It is an amenable number.

20771252 is a deficient number, since it is larger than the sum of its proper divisors (15578446).

20771252 is a wasteful number, since it uses less digits than its factorization.

20771252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192817 (or 5192815 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20771252 is about 4557.5489026449. The cubic root of 20771252 is about 274.8870147428.

Adding to 20771252 its reverse (25217702), we get a palindrome (45988954).

The spelling of 20771252 in words is "twenty million, seven hundred seventy-one thousand, two hundred fifty-two".