21701365477009 has 8 divisors (see below), whose sum is σ = 21787034249088. Its totient is φ = 21615829629840.

The previous prime is 21701365476911. The next prime is 21701365477031. The reversal of 21701365477009 is 90077456310712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21701365477009 - 2¹⁹ = 21701364952721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21701365477039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32904057 + ... + 33557110.

It is an arithmetic number, because the mean of its divisors is an integer number (2723379281136).

Almost surely, 2^{21701365477009} is an apocalyptic number.

It is an amenable number.

21701365477009 is a deficient number, since it is larger than the sum of its proper divisors (85668772079).

21701365477009 is an equidigital number, since it uses as much as digits as its factorization.

21701365477009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66462455.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 21701365477009 in words is "twenty-one trillion, seven hundred one billion, three hundred sixty-five million, four hundred seventy-seven thousand, nine".