21734136233773 has 4 divisors (see below), whose sum is σ = 21743380870848. Its totient is φ = 21724891596700.

The previous prime is 21734136233767. The next prime is 21734136233839. The reversal of 21734136233773 is 37733263143712.

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 21734136233773 - 2²⁹ = 21733599362861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21734136233773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734136233753) 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, 4622315011 + ... + 4622319712.

It is an arithmetic number, because the mean of its divisors is an integer number (5435845217712).

Almost surely, 2^{21734136233773} is an apocalyptic number.

It is an amenable number.

21734136233773 is a deficient number, since it is larger than the sum of its proper divisors (9244637075).

21734136233773 is an equidigital number, since it uses as much as digits as its factorization.

21734136233773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244637074.

The product of its digits is 8001504, while the sum is 52.

The spelling of 21734136233773 in words is "twenty-one trillion, seven hundred thirty-four billion, one hundred thirty-six million, two hundred thirty-three thousand, seven hundred seventy-three".