20525243355 has 24 divisors (see below), whose sum is σ = 37123920288. Its totient is φ = 10470848256.

The previous prime is 20525243351. The next prime is 20525243371. The reversal of 20525243355 is 55334252502.

20525243355 is a `hidden beast` number, since 2 + 0 + 52 + 524 + 33 + 55 = 666.

It is not a de Polignac number, because 20525243355 - 2² = 20525243351 is a prime.

It is a super-2 number, since 2×20525243355² (a number of 21 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 9914542 + ... + 9916611.

It is an arithmetic number, because the mean of its divisors is an integer number (1546830012).

Almost surely, 2^20525243355 is an apocalyptic number.

20525243355 is a deficient number, since it is larger than the sum of its proper divisors (16598676933).

20525243355 is a wasteful number, since it uses less digits than its factorization.

20525243355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19831187 (or 19831184 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 20525243355 its reverse (55334252502), we get a palindrome (75859495857).

The spelling of 20525243355 in words is "twenty billion, five hundred twenty-five million, two hundred forty-three thousand, three hundred fifty-five".