21353346223 has 32 divisors (see below), whose sum is σ = 23811840000. Its totient is φ = 18987544800.

The previous prime is 21353346199. The next prime is 21353346229. The reversal of 21353346223 is 32264335312.

It is a cyclic number.

It is not a de Polignac number, because 21353346223 - 2⁵ = 21353346191 is a prime.

It is a super-3 number, since 3×21353346223³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353346229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42792028 + ... + 42792526.

It is an arithmetic number, because the mean of its divisors is an integer number (744120000).

Almost surely, 2^21353346223 is an apocalyptic number.

21353346223 is a deficient number, since it is larger than the sum of its proper divisors (2458493777).

21353346223 is a wasteful number, since it uses less digits than its factorization.

21353346223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its digits is 77760, while the sum is 34.

The spelling of 21353346223 in words is "twenty-one billion, three hundred fifty-three million, three hundred forty-six thousand, two hundred twenty-three".