21849027170 has 16 divisors (see below), whose sum is σ = 40684395960. Its totient is φ = 8438244864.

The previous prime is 21849027157. The next prime is 21849027197. The reversal of 21849027170 is 7172094812.

It can be written as a sum of positive squares in 4 ways, for example, as 20551802881 + 1297224289 = 143359^2 + 36017^2 .

It is a Curzon 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, 37670447 + ... + 37671026.

Almost surely, 2^21849027170 is an apocalyptic number.

21849027170 is a deficient number, since it is larger than the sum of its proper divisors (18835368790).

21849027170 is a wasteful number, since it uses less digits than its factorization.

21849027170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75341509.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 21849027170 in words is "twenty-one billion, eight hundred forty-nine million, twenty-seven thousand, one hundred seventy".