21601677313019 has 4 divisors (see below), whose sum is σ = 21606655809480. Its totient is φ = 21596698816560.

The previous prime is 21601677312973. The next prime is 21601677313057. The reversal of 21601677313019 is 91031377610612.

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 21601677313019 - 2⁸ = 21601677312763 is a prime.

It is a super-2 number, since 2×21601677313019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21601677313079) 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, 2489241722 + ... + 2489250399.

It is an arithmetic number, because the mean of its divisors is an integer number (5401663952370).

Almost surely, 2^{21601677313019} is an apocalyptic number.

21601677313019 is a deficient number, since it is larger than the sum of its proper divisors (4978496461).

21601677313019 is an equidigital number, since it uses as much as digits as its factorization.

21601677313019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978496460.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 21601677313019 in words is "twenty-one trillion, six hundred one billion, six hundred seventy-seven million, three hundred thirteen thousand, nineteen".