21044345032 has 8 divisors (see below), whose sum is σ = 39458146950. Its totient is φ = 10522172512.

The previous prime is 21044345011. The next prime is 21044345053. The reversal of 21044345032 is 23054344012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21044345011) and next prime (21044345053).

It can be written as a sum of positive squares in only one way, i.e., 17112302596 + 3932042436 = 130814^2 + 62706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1315271557 + ... + 1315271572.

Almost surely, 2^21044345032 is an apocalyptic number.

It is an amenable number.

21044345032 is a deficient number, since it is larger than the sum of its proper divisors (18413801918).

21044345032 is a wasteful number, since it uses less digits than its factorization.

21044345032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630543135 (or 2630543131 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21044345032 its reverse (23054344012), we get a palindrome (44098689044).

The spelling of 21044345032 in words is "twenty-one billion, forty-four million, three hundred forty-five thousand, thirty-two".