20525243356 has 24 divisors (see below), whose sum is σ = 36153810000. Its totient is φ = 10195691904.

The previous prime is 20525243351. The next prime is 20525243371. The reversal of 20525243356 is 65334252502.

It is a super-2 number, since 2×20525243356² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525243351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781120 + ... + 806968.

It is an arithmetic number, because the mean of its divisors is an integer number (1506408750).

Almost surely, 2^20525243356 is an apocalyptic number.

It is an amenable number.

20525243356 is a deficient number, since it is larger than the sum of its proper divisors (15628566644).

20525243356 is a wasteful number, since it uses less digits than its factorization.

20525243356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27141 (or 27139 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 20525243356 its reverse (65334252502), we get a palindrome (85859495858).

The spelling of 20525243356 in words is "twenty billion, five hundred twenty-five million, two hundred forty-three thousand, three hundred fifty-six".