20516525355 has 8 divisors (see below), whose sum is σ = 32826440592. Its totient is φ = 10942146848.

The previous prime is 20516525353. The next prime is 20516525459. The reversal of 20516525355 is 55352561502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20516525355 - 2¹ = 20516525353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20516525353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683884164 + ... + 683884193.

It is an arithmetic number, because the mean of its divisors is an integer number (4103305074).

Almost surely, 2^20516525355 is an apocalyptic number.

20516525355 is a deficient number, since it is larger than the sum of its proper divisors (12309915237).

20516525355 is a wasteful number, since it uses less digits than its factorization.

20516525355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367768365.

The product of its (nonzero) digits is 225000, while the sum is 39.

The spelling of 20516525355 in words is "twenty billion, five hundred sixteen million, five hundred twenty-five thousand, three hundred fifty-five".