20609527778112 has 112 divisors (see below), whose sum is σ = 67113077693312. Its totient is φ = 5435479848960.

The previous prime is 20609527778039. The next prime is 20609527778117. The reversal of 20609527778112 is 21187772590602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20609527778117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589769839 + ... + 589804782.

It is an arithmetic number, because the mean of its divisors is an integer number (599223907976).

Almost surely, 2^{20609527778112} is an apocalyptic number.

It is an amenable number.

20609527778112 is an abundant number, since it is smaller than the sum of its proper divisors (46503549915200).

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

20609527778112 is a wasteful number, since it uses less digits than its factorization.

20609527778112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179574656 (or 1179574646 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 20609527778112 in words is "twenty trillion, six hundred nine billion, five hundred twenty-seven million, seven hundred seventy-eight thousand, one hundred twelve".