21877211842048 has 80 divisors (see below), whose sum is σ = 44833337714880. Its totient is φ = 10659918954496.

The previous prime is 21877211842039. The next prime is 21877211842091. The reversal of 21877211842048 is 84024811277812.

It is a super-2 number, since 2×21877211842048² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21877211842048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3655998 + ... + 7557826.

It is an arithmetic number, because the mean of its divisors is an integer number (560416721436).

Almost surely, 2^{21877211842048} 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 21877211842048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22416668857440).

21877211842048 is an abundant number, since it is smaller than the sum of its proper divisors (22956125872832).

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

21877211842048 is an equidigital number, since it uses as much as digits as its factorization.

21877211842048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902127 (or 3902111 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 55.

The spelling of 21877211842048 in words is "twenty-one trillion, eight hundred seventy-seven billion, two hundred eleven million, eight hundred forty-two thousand, forty-eight".