20225756 has 6 divisors (see below), whose sum is σ = 35395080. Its totient is φ = 10112876.

The previous prime is 20225753. The next prime is 20225771. The reversal of 20225756 is 65752202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2528216 + ... + 2528223.

It is an arithmetic number, because the mean of its divisors is an integer number (5899180).

Almost surely, 2^20225756 is an apocalyptic number.

It is an amenable number.

20225756 is a deficient number, since it is larger than the sum of its proper divisors (15169324).

20225756 is a wasteful number, since it uses less digits than its factorization.

20225756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056443 (or 5056441 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20225756 is about 4497.3054154682. The cubic root of 20225756 is about 272.4592695064.

Adding to 20225756 its reverse (65752202), we get a palindrome (85977958).

The spelling of 20225756 in words is "twenty million, two hundred twenty-five thousand, seven hundred fifty-six".