21448332410 has 16 divisors (see below), whose sum is σ = 38641581576. Its totient is φ = 8571647808.

The previous prime is 21448332391. The next prime is 21448332461. The reversal of 21448332410 is 1423384412.

It can be written as a sum of positive squares in 4 ways, for example, as 11345871289 + 10102461121 = 106517^2 + 100511^2 .

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, 948917 + ... + 971256.

Almost surely, 2^21448332410 is an apocalyptic number.

21448332410 is a deficient number, since it is larger than the sum of its proper divisors (17193249166).

21448332410 is a wasteful number, since it uses less digits than its factorization.

21448332410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921297.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 21448332410 in words is "twenty-one billion, four hundred forty-eight million, three hundred thirty-two thousand, four hundred ten".