21273374210 has 24 divisors (see below), whose sum is σ = 42089636988. Its totient is φ = 7735772000.

The previous prime is 21273374209. The next prime is 21273374233. The reversal of 21273374210 is 1247337212.

It can be written as a sum of positive squares in 2 ways, for example, as 20603444521 + 669929689 = 143539^2 + 25883^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8789441 + ... + 8791860.

Almost surely, 2^21273374210 is an apocalyptic number.

21273374210 is a deficient number, since it is larger than the sum of its proper divisors (20816262778).

21273374210 is a wasteful number, since it uses less digits than its factorization.

21273374210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17581330 (or 17581319 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 21273374210 in words is "twenty-one billion, two hundred seventy-three million, three hundred seventy-four thousand, two hundred ten".