20986818252 has 24 divisors (see below), whose sum is σ = 50657838000. Its totient is φ = 6754378176.

The previous prime is 20986818241. The next prime is 20986818269. The reversal of 20986818252 is 25281868902.

It is a junction number, because it is equal to n+sod(n) for n = 20986818195 and 20986818204.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30153127 + ... + 30153822.

It is an arithmetic number, because the mean of its divisors is an integer number (2110743250).

Almost surely, 2^20986818252 is an apocalyptic number.

It is an amenable number.

20986818252 is an abundant number, since it is smaller than the sum of its proper divisors (29671019748).

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

20986818252 is a wasteful number, since it uses less digits than its factorization.

20986818252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60306985 (or 60306983 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 20986818252 in words is "twenty billion, nine hundred eighty-six million, eight hundred eighteen thousand, two hundred fifty-two".