21344240210 has 8 divisors (see below), whose sum is σ = 38419632396. Its totient is φ = 8537696080.

The previous prime is 21344240179. The next prime is 21344240227. The reversal of 21344240210 is 1204244312.

It can be written as a sum of positive squares in 2 ways, for example, as 20496789889 + 847450321 = 143167^2 + 29111^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067212001 + ... + 1067212020.

Almost surely, 2^21344240210 is an apocalyptic number.

21344240210 is a deficient number, since it is larger than the sum of its proper divisors (17075392186).

21344240210 is a wasteful number, since it uses less digits than its factorization.

21344240210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134424028.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21344240210 its reverse (1204244312), we get a palindrome (22548484522).

The spelling of 21344240210 in words is "twenty-one billion, three hundred forty-four million, two hundred forty thousand, two hundred ten".