20636922812944 has 45 divisors (see below), whose sum is σ = 40071435147471. Its totient is φ = 10295956434720.

The previous prime is 20636922812897. The next prime is 20636922813097. The reversal of 20636922812944 is 44921822963602.

It is a happy number.

The square root of 20636922812944 is 4542788.

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

It is a super-2 number, since 2×20636922812944² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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, 11029888329 + ... + 11029890199.

Almost surely, 2^{20636922812944} is an apocalyptic number.

20636922812944 is the 4542788-th square number.

It is an amenable number.

20636922812944 is a deficient number, since it is larger than the sum of its proper divisors (19434512334527).

20636922812944 is an frugal number, since it uses more digits than its factorization.

20636922812944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 20636922812944 in words is "twenty trillion, six hundred thirty-six billion, nine hundred twenty-two million, eight hundred twelve thousand, nine hundred forty-four".