21246346057073 has 4 divisors (see below), whose sum is σ = 21545590367808. Its totient is φ = 20947101746340.

The previous prime is 21246346057063. The next prime is 21246346057121. The reversal of 21246346057073 is 37075064364212.

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.

It is a cyclic number.

It is not a de Polignac number, because 21246346057073 - 2¹⁰ = 21246346056049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21246346057063) 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, 149622155261 + ... + 149622155402.

It is an arithmetic number, because the mean of its divisors is an integer number (5386397591952).

Almost surely, 2^{21246346057073} is an apocalyptic number.

It is an amenable number.

21246346057073 is a deficient number, since it is larger than the sum of its proper divisors (299244310735).

21246346057073 is an equidigital number, since it uses as much as digits as its factorization.

21246346057073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299244310734.

The product of its (nonzero) digits is 5080320, while the sum is 50.

The spelling of 21246346057073 in words is "twenty-one trillion, two hundred forty-six billion, three hundred forty-six million, fifty-seven thousand, seventy-three".