21346144361 has 16 divisors (see below), whose sum is σ = 21782745600. Its totient is φ = 20914365888.

The previous prime is 21346144357. The next prime is 21346144387. The reversal of 21346144361 is 16344164312.

It is a cyclic number.

It is not a de Polignac number, because 21346144361 - 2² = 21346144357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21346144321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5753375 + ... + 5757083.

It is an arithmetic number, because the mean of its divisors is an integer number (1361421600).

Almost surely, 2^21346144361 is an apocalyptic number.

It is an amenable number.

21346144361 is a deficient number, since it is larger than the sum of its proper divisors (436601239).

21346144361 is a wasteful number, since it uses less digits than its factorization.

21346144361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328.

The product of its digits is 41472, while the sum is 35.

The spelling of 21346144361 in words is "twenty-one billion, three hundred forty-six million, one hundred forty-four thousand, three hundred sixty-one".