21444572010 has 32 divisors (see below), whose sum is σ = 51471288000. Its totient is φ = 5718073088.

The previous prime is 21444572003. The next prime is 21444572033. The reversal of 21444572010 is 1027544412.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 471241 + ... + 514739.

It is an arithmetic number, because the mean of its divisors is an integer number (1608477750).

Almost surely, 2^21444572010 is an apocalyptic number.

21444572010 is an abundant number, since it is smaller than the sum of its proper divisors (30026715990).

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

21444572010 is a wasteful number, since it uses less digits than its factorization.

21444572010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59942.

The product of its (nonzero) digits is 8960, while the sum is 30.

The spelling of 21444572010 in words is "twenty-one billion, four hundred forty-four million, five hundred seventy-two thousand, ten".