21871184888068 has 12 divisors (see below), whose sum is σ = 38423501857692. Its totient is φ = 10893041500160.

The previous prime is 21871184887987. The next prime is 21871184888183. The reversal of 21871184888068 is 86088848117812.

It can be written as a sum of positive squares in 2 ways, for example, as 13013608923844 + 8857575964224 = 3607438^2 + 2976168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21871184887988 and 21871184888006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10637734813 + ... + 10637736868.

It is an arithmetic number, because the mean of its divisors is an integer number (3201958488141).

Almost surely, 2^{21871184888068} is an apocalyptic number.

It is an amenable number.

21871184888068 is a deficient number, since it is larger than the sum of its proper divisors (16552316969624).

21871184888068 is a wasteful number, since it uses less digits than its factorization.

21871184888068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21275471942 (or 21275471940 counting only the distinct ones).

The product of its (nonzero) digits is 88080384, while the sum is 70.

The spelling of 21871184888068 in words is "twenty-one trillion, eight hundred seventy-one billion, one hundred eighty-four million, eight hundred eighty-eight thousand, sixty-eight".