20772252 has 18 divisors (see below), whose sum is σ = 52507728. Its totient is φ = 6924072.

The previous prime is 20772251. The next prime is 20772293. The reversal of 20772252 is 25227702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772251) 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, 288468 + ... + 288539.

It is an arithmetic number, because the mean of its divisors is an integer number (2917096).

Almost surely, 2^20772252 is an apocalyptic number.

It is an amenable number.

20772252 is an abundant number, since it is smaller than the sum of its proper divisors (31735476).

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

20772252 is a wasteful number, since it uses less digits than its factorization.

20772252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577017 (or 577012 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20772252 is about 4557.6586094178. The cubic root of 20772252 is about 274.8914260096.

Adding to 20772252 its reverse (25227702), we get a palindrome (45999954).

The spelling of 20772252 in words is "twenty million, seven hundred seventy-two thousand, two hundred fifty-two".