20812101696 has 63 divisors (see below), whose sum is σ = 59664057583. Its totient is φ = 6936213120.

The previous prime is 20812101637. The next prime is 20812101707. The reversal of 20812101696 is 69610121802.

The square root of 20812101696 is 144264.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20812101696.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 3459331 + ... + 3465341.

Almost surely, 2^20812101696 is an apocalyptic number.

20812101696 is the 144264-th square number.

It is an amenable number.

20812101696 is an abundant number, since it is smaller than the sum of its proper divisors (38851955887).

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

20812101696 is an frugal number, since it uses more digits than its factorization.

20812101696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12040 (or 6016 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

Multiplying 20812101696 by its sum of digits (36), we get a square (749235661056 = 865584²).

20812101696 divided by its sum of digits (36) gives a square (578113936 = 24044²).

The spelling of 20812101696 in words is "twenty billion, eight hundred twelve million, one hundred one thousand, six hundred ninety-six".