21375055033156 has 48 divisors (see below), whose sum is σ = 41322224966400. Its totient is φ = 9593377305120.

The previous prime is 21375055033099. The next prime is 21375055033169. The reversal of 21375055033156 is 65133055057312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4704895 + ... + 8055193.

It is an arithmetic number, because the mean of its divisors is an integer number (860879686800).

Almost surely, 2^{21375055033156} is an apocalyptic number.

It is an amenable number.

21375055033156 is a deficient number, since it is larger than the sum of its proper divisors (19947169933244).

21375055033156 is a wasteful number, since it uses less digits than its factorization.

21375055033156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352144 (or 3352142 counting only the distinct ones).

The product of its (nonzero) digits is 1417500, while the sum is 46.

The spelling of 21375055033156 in words is "twenty-one trillion, three hundred seventy-five billion, fifty-five million, thirty-three thousand, one hundred fifty-six".