20052756 has 18 divisors (see below), whose sum is σ = 50689002. Its totient is φ = 6684240.

The previous prime is 20052751. The next prime is 20052787. The reversal of 20052756 is 65725002.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 1648656 = 4290^2 + 1284^2 .

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

It is a super-2 number, since 2×20052756² = 804226046391072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20052751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278475 + ... + 278546.

Almost surely, 2^20052756 is an apocalyptic number.

It is an amenable number.

20052756 is an abundant number, since it is smaller than the sum of its proper divisors (30636246).

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

20052756 is a wasteful number, since it uses less digits than its factorization.

20052756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557031 (or 557026 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20052756 is about 4478.0303705982. The cubic root of 20052756 is about 271.6802218051.

Adding to 20052756 its reverse (65725002), we get a palindrome (85777758).

It can be divided in two parts, 2005 and 2756, that added together give a square (4761 = 69²).

The spelling of 20052756 in words is "twenty million, fifty-two thousand, seven hundred fifty-six".