21928036914577 has 4 divisors (see below), whose sum is σ = 21928046615280. Its totient is φ = 21928027213876.

The previous prime is 21928036914533. The next prime is 21928036914587. The reversal of 21928036914577 is 77541963082912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21928036914577 - 2¹⁹ = 21928036390289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21928036914587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529074 + ... + 6643492.

It is an arithmetic number, because the mean of its divisors is an integer number (5482011653820).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21928036914577 = 43856073829154, but 3⋅21928036914577 = 65784110743731 is not.

Almost surely, 2^{21928036914577} is an apocalyptic number.

It is an amenable number.

21928036914577 is a deficient number, since it is larger than the sum of its proper divisors (9700703).

21928036914577 is an equidigital number, since it uses as much as digits as its factorization.

21928036914577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9700702.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 21928036914577 in words is "twenty-one trillion, nine hundred twenty-eight billion, thirty-six million, nine hundred fourteen thousand, five hundred seventy-seven".