21044582716 has 6 divisors (see below), whose sum is σ = 36828019760. Its totient is φ = 10522291356.

The previous prime is 21044582617. The next prime is 21044582731. The reversal of 21044582716 is 61728544012.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2630572836 + ... + 2630572843.

Almost surely, 2^21044582716 is an apocalyptic number.

It is an amenable number.

21044582716 is a deficient number, since it is larger than the sum of its proper divisors (15783437044).

21044582716 is a wasteful number, since it uses less digits than its factorization.

21044582716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261145683 (or 5261145681 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 21044582716 in words is "twenty-one billion, forty-four million, five hundred eighty-two thousand, seven hundred sixteen".