21440512410 has 64 divisors (see below), whose sum is σ = 53287839360. Its totient is φ = 5517607680.

The previous prime is 21440512409. The next prime is 21440512451. The reversal of 21440512410 is 1421504412.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13540 + ... + 207519.

It is an arithmetic number, because the mean of its divisors is an integer number (832622490).

Almost surely, 2^21440512410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21440512410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26643919680).

21440512410 is an abundant number, since it is smaller than the sum of its proper divisors (31847326950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21440512410 is a wasteful number, since it uses less digits than its factorization.

21440512410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221183.

The product of its (nonzero) digits is 1280, while the sum is 24.

The spelling of 21440512410 in words is "twenty-one billion, four hundred forty million, five hundred twelve thousand, four hundred ten".