21603266061712 has 80 divisors (see below), whose sum is σ = 44424746277120. Its totient is φ = 10148348995200.

The previous prime is 21603266061679. The next prime is 21603266061719. The reversal of 21603266061712 is 21716066230612.

It is a super-2 number, since 2×21603266061712² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21603266061719) 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, 60793383 + ... + 61147705.

It is an arithmetic number, because the mean of its divisors is an integer number (555309328464).

Almost surely, 2^{21603266061712} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21603266061712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22212373138560).

21603266061712 is an abundant number, since it is smaller than the sum of its proper divisors (22821480215408).

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

21603266061712 is a wasteful number, since it uses less digits than its factorization.

21603266061712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356012 (or 356006 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 21603266061712 in words is "twenty-one trillion, six hundred three billion, two hundred sixty-six million, sixty-one thousand, seven hundred twelve".