21444011010 has 64 divisors (see below), whose sum is σ = 57311712000. Its totient is φ = 5705634816.

The previous prime is 21444010999. The next prime is 21444011027. The reversal of 21444011010 is 1011044412.

21444011010 is a `hidden beast` number, since 214 + 440 + 1 + 1 + 0 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32787 + ... + 209673.

It is an arithmetic number, because the mean of its divisors is an integer number (895495500).

Almost surely, 2^21444011010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21444011010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28655856000).

21444011010 is an abundant number, since it is smaller than the sum of its proper divisors (35867700990).

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

21444011010 is a wasteful number, since it uses less digits than its factorization.

21444011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177352 (or 177346 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21444011010 its reverse (1011044412), we get a palindrome (22455055422).

The spelling of 21444011010 in words is "twenty-one billion, four hundred forty-four million, eleven thousand, ten".