21826155608 has 32 divisors (see below), whose sum is σ = 43086072000. Its totient is φ = 10336753440.

The previous prime is 21826155599. The next prime is 21826155613. The reversal of 21826155608 is 80655162812.

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, 1087343 + ... + 1107233.

It is an arithmetic number, because the mean of its divisors is an integer number (1346439750).

Almost surely, 2^21826155608 is an apocalyptic number.

It is an amenable number.

21826155608 is a deficient number, since it is larger than the sum of its proper divisors (21259916392).

21826155608 is a wasteful number, since it uses less digits than its factorization.

21826155608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27135 (or 27131 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 21826155608 in words is "twenty-one billion, eight hundred twenty-six million, one hundred fifty-five thousand, six hundred eight".