21044458701 has 48 divisors (see below), whose sum is σ = 35515584000. Its totient is φ = 12002834592.

The previous prime is 21044458697. The next prime is 21044458703. The reversal of 21044458701 is 10785444012.

It is a happy number.

It is not a de Polignac number, because 21044458701 - 2² = 21044458697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044458703) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 1713340 + ... + 1725578.

It is an arithmetic number, because the mean of its divisors is an integer number (739908000).

Almost surely, 2^21044458701 is an apocalyptic number.

21044458701 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21044458701 is a deficient number, since it is larger than the sum of its proper divisors (14471125299).

21044458701 is a wasteful number, since it uses less digits than its factorization.

21044458701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12823 (or 12806 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 21044458701 in words is "twenty-one billion, forty-four million, four hundred fifty-eight thousand, seven hundred one".