21275553170 has 16 divisors (see below), whose sum is σ = 38300145408. Its totient is φ = 8509299120.

The previous prime is 21275553163. The next prime is 21275553179. The reversal of 21275553170 is 7135557212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21275553179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14144 + ... + 206763.

It is an arithmetic number, because the mean of its divisors is an integer number (2393759088).

Almost surely, 2^21275553170 is an apocalyptic number.

21275553170 is a deficient number, since it is larger than the sum of its proper divisors (17024592238).

21275553170 is a wasteful number, since it uses less digits than its factorization.

21275553170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230545.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 21275553170 in words is "twenty-one billion, two hundred seventy-five million, five hundred fifty-three thousand, one hundred seventy".