21014105445 has 12 divisors (see below), whose sum is σ = 36424449516. Its totient is φ = 11207522880.

The previous prime is 21014105443. The next prime is 21014105449. The reversal of 21014105445 is 54450141012.

21014105445 is a `hidden beast` number, since 2 + 101 + 4 + 10 + 544 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15667278561 + 5346826884 = 125169^2 + 73122^2 .

It is not a de Polignac number, because 21014105445 - 2¹ = 21014105443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014105443) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 233490016 + ... + 233490105.

It is an arithmetic number, because the mean of its divisors is an integer number (3035370793).

Almost surely, 2^21014105445 is an apocalyptic number.

It is an amenable number.

21014105445 is a deficient number, since it is larger than the sum of its proper divisors (15410344071).

21014105445 is a wasteful number, since it uses less digits than its factorization.

21014105445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466980132 (or 466980129 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21014105445 its reverse (54450141012), we get a palindrome (75464246457).

The spelling of 21014105445 in words is "twenty-one billion, fourteen million, one hundred five thousand, four hundred forty-five".