21143266610 has 8 divisors (see below), whose sum is σ = 38057879916. Its totient is φ = 8457306640.

The previous prime is 21143266591. The next prime is 21143266631. The reversal of 21143266610 is 1666234112.

It can be written as a sum of positive squares in 2 ways, for example, as 17963772841 + 3179493769 = 134029^2 + 56387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057163321 + ... + 1057163340.

Almost surely, 2^21143266610 is an apocalyptic number.

21143266610 is a deficient number, since it is larger than the sum of its proper divisors (16914613306).

21143266610 is a wasteful number, since it uses less digits than its factorization.

21143266610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114326668.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 21143266610 in words is "twenty-one billion, one hundred forty-three million, two hundred sixty-six thousand, six hundred ten".