20992273691064 has 128 divisors (see below), whose sum is σ = 59525595360000. Its totient is φ = 6115777910784.

The previous prime is 20992273691063. The next prime is 20992273691161. The reversal of 20992273691064 is 46019637229902.

It is a junction number, because it is equal to n+sod(n) for n = 20992273690989 and 20992273691007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992273691063) 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 31 ways as a sum of consecutive naturals, for example, 9602512 + ... + 11584160.

It is an arithmetic number, because the mean of its divisors is an integer number (465043713750).

Almost surely, 2^{20992273691064} is an apocalyptic number.

20992273691064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20992273691064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29762797680000).

20992273691064 is an abundant number, since it is smaller than the sum of its proper divisors (38533321668936).

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

20992273691064 is a wasteful number, since it uses less digits than its factorization.

20992273691064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983477 (or 1983473 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 20992273691064 in words is "twenty trillion, nine hundred ninety-two billion, two hundred seventy-three million, six hundred ninety-one thousand, sixty-four".