21044301444 has 48 divisors (see below), whose sum is σ = 56931450240. Its totient is φ = 6709776480.

The previous prime is 21044301433. The next prime is 21044301457. The reversal of 21044301444 is 44410344012.

21044301444 is a `hidden beast` number, since 210 + 4 + 4 + 3 + 0 + 1 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4233487 + ... + 4238454.

It is an arithmetic number, because the mean of its divisors is an integer number (1186071880).

Almost surely, 2^21044301444 is an apocalyptic number.

It is an amenable number.

21044301444 is an abundant number, since it is smaller than the sum of its proper divisors (35887148796).

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

21044301444 is a wasteful number, since it uses less digits than its factorization.

21044301444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8471977 (or 8471969 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21044301444 its reverse (44410344012), we get a palindrome (65454645456).

The spelling of 21044301444 in words is "twenty-one billion, forty-four million, three hundred one thousand, four hundred forty-four".