20525054215 has 24 divisors (see below), whose sum is σ = 25384756320.
Its totient is φ = 15931444608.
The previous prime is 20525054201. The next prime is 20525054219. The reversal of 20525054215 is 51245052502.
It is a happy number.
It is a de Polignac number, because none of the positive numbers 2k-20525054215 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20525054219) 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, 2549166 + ... + 2557204.
It is an arithmetic number, because the mean of its divisors is an integer number (1057698180).
Almost surely, 220525054215 is an apocalyptic number.
20525054215 is a deficient number, since it is larger than the sum of its proper divisors (4859702105).
20525054215 is an equidigital number, since it uses as much as digits as its factorization.
20525054215 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8491 (or 8454 counting only the distinct ones).
The product of its (nonzero) digits is 20000, while the sum is 31.
The spelling of 20525054215 in words is "twenty billion, five hundred twenty-five million, fifty-four thousand, two hundred fifteen".