21273284808488 has 16 divisors (see below), whose sum is σ = 41621644190880. Its totient is φ = 10174179690928.

The previous prime is 21273284808469. The next prime is 21273284808547. The reversal of 21273284808488 is 88480848237212.

It is a super-2 number, since 2×21273284808488² (a number of 27 digits) contains 22 as substring.

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, 57807838970 + ... + 57807839337.

It is an arithmetic number, because the mean of its divisors is an integer number (2601352761930).

Almost surely, 2^{21273284808488} is an apocalyptic number.

It is an amenable number.

21273284808488 is a deficient number, since it is larger than the sum of its proper divisors (20348359382392).

21273284808488 is a wasteful number, since it uses less digits than its factorization.

21273284808488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115615678336 (or 115615678332 counting only the distinct ones).

The product of its (nonzero) digits is 88080384, while the sum is 65.

The spelling of 21273284808488 in words is "twenty-one trillion, two hundred seventy-three billion, two hundred eighty-four million, eight hundred eight thousand, four hundred eighty-eight".