21007112759629 has 4 divisors (see below), whose sum is σ = 21035771850076. Its totient is φ = 20978453669184.

The previous prime is 21007112759587. The next prime is 21007112759683. The reversal of 21007112759629 is 92695721170012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20779466402500 + 227646357129 = 4558450^2 + 477123^2 .

It is a cyclic number.

It is not a de Polignac number, because 21007112759629 - 2⁹ = 21007112759117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21007112754629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14329544124 + ... + 14329545589.

It is an arithmetic number, because the mean of its divisors is an integer number (5258942962519).

Almost surely, 2^{21007112759629} is an apocalyptic number.

It is an amenable number.

21007112759629 is a deficient number, since it is larger than the sum of its proper divisors (28659090447).

21007112759629 is an equidigital number, since it uses as much as digits as its factorization.

21007112759629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28659090446.

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 21007112759629 in words is "twenty-one trillion, seven billion, one hundred twelve million, seven hundred fifty-nine thousand, six hundred twenty-nine".