20525206512 has 80 divisors (see below), whose sum is σ = 54483004928. Its totient is φ = 6654735360.

The previous prime is 20525206483. The next prime is 20525206519. The reversal of 20525206512 is 21560252502.

It is a super-2 number, since 2×20525206512² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20525206512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525206519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476793 + ... + 518055.

Almost surely, 2^20525206512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20525206512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27241502464).

20525206512 is an abundant number, since it is smaller than the sum of its proper divisors (33957798416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20525206512 is a wasteful number, since it uses less digits than its factorization.

20525206512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41558 (or 41552 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20525206512 in words is "twenty billion, five hundred twenty-five million, two hundred six thousand, five hundred twelve".