21293481834013 has 4 divisors (see below), whose sum is σ = 21746534639040. Its totient is φ = 20840429028988.

The previous prime is 21293481834011. The next prime is 21293481834043. The reversal of 21293481834013 is 31043818439212.

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 21293481834013 - 2¹ = 21293481834011 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 (21293481834011) 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, 226526402443 + ... + 226526402536.

It is an arithmetic number, because the mean of its divisors is an integer number (5436633659760).

Almost surely, 2^{21293481834013} is an apocalyptic number.

It is an amenable number.

21293481834013 is a deficient number, since it is larger than the sum of its proper divisors (453052805027).

21293481834013 is an equidigital number, since it uses as much as digits as its factorization.

21293481834013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453052805026.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 21293481834013 in words is "twenty-one trillion, two hundred ninety-three billion, four hundred eighty-one million, eight hundred thirty-four thousand, thirteen".