21044301445 has 16 divisors (see below), whose sum is σ = 27390808368. Its totient is φ = 15458652160.

The previous prime is 21044301433. The next prime is 21044301457. The reversal of 21044301445 is 54410344012.

It is an interprime number because it is at equal distance from previous prime (21044301433) and next prime (21044301457).

It can be written as a sum of positive squares in 8 ways, for example, as 1757202561 + 19287098884 = 41919^2 + 138878^2 .

It is not a de Polignac number, because 21044301445 - 2⁵ = 21044301413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3015784 + ... + 3022753.

It is an arithmetic number, because the mean of its divisors is an integer number (1711925523).

Almost surely, 2^21044301445 is an apocalyptic number.

It is an amenable number.

21044301445 is a deficient number, since it is larger than the sum of its proper divisors (6346506923).

21044301445 is a wasteful number, since it uses less digits than its factorization.

21044301445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038600.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21044301445 its reverse (54410344012), we get a palindrome (75454645457).

The spelling of 21044301445 in words is "twenty-one billion, forty-four million, three hundred one thousand, four hundred forty-five".