21346375261 has 8 divisors (see below), whose sum is σ = 22650451200. Its totient is φ = 20047677888.

The previous prime is 21346375249. The next prime is 21346375277. The reversal of 21346375261 is 16257364312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21346375261 - 2⁵ = 21346375229 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 (21346375201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336461 + ... + 1352338.

It is an arithmetic number, because the mean of its divisors is an integer number (2831306400).

Almost surely, 2^21346375261 is an apocalyptic number.

It is an amenable number.

21346375261 is a deficient number, since it is larger than the sum of its proper divisors (1304075939).

21346375261 is a wasteful number, since it uses less digits than its factorization.

21346375261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689283.

The product of its digits is 181440, while the sum is 40.

The spelling of 21346375261 in words is "twenty-one billion, three hundred forty-six million, three hundred seventy-five thousand, two hundred sixty-one".