20816243562 has 8 divisors (see below), whose sum is σ = 41632487136. Its totient is φ = 6938747852.

The previous prime is 20816243551. The next prime is 20816243593. The reversal of 20816243562 is 26534261802.

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

20816243562 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20816243562.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734686958 + ... + 1734686969.

It is an arithmetic number, because the mean of its divisors is an integer number (5204060892).

Almost surely, 2^20816243562 is an apocalyptic number.

20816243562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20816243562 is a wasteful number, since it uses less digits than its factorization.

20816243562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469373932.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 20816243562 in words is "twenty billion, eight hundred sixteen million, two hundred forty-three thousand, five hundred sixty-two".