21024772606727 has 4 divisors (see below), whose sum is σ = 21059409794496. Its totient is φ = 20990135418960.

The previous prime is 21024772606699. The next prime is 21024772606759. The reversal of 21024772606727 is 72760627742012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21024772606727 - 2²⁰ = 21024771558151 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 (21024772686727) 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, 17318592974 + ... + 17318594187.

It is an arithmetic number, because the mean of its divisors is an integer number (5264852448624).

Almost surely, 2^{21024772606727} is an apocalyptic number.

21024772606727 is a deficient number, since it is larger than the sum of its proper divisors (34637187769).

21024772606727 is an equidigital number, since it uses as much as digits as its factorization.

21024772606727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34637187768.

The product of its (nonzero) digits is 5531904, while the sum is 53.

The spelling of 21024772606727 in words is "twenty-one trillion, twenty-four billion, seven hundred seventy-two million, six hundred six thousand, seven hundred twenty-seven".