21346344305 has 16 divisors (see below), whose sum is σ = 30093868224. Its totient is φ = 14330412480.

The previous prime is 21346344211. The next prime is 21346344317. The reversal of 21346344305 is 50344364312.

It is not a de Polignac number, because 21346344305 - 2¹⁰ = 21346343281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14926799 + ... + 14928228.

It is an arithmetic number, because the mean of its divisors is an integer number (1880866764).

Almost surely, 2^21346344305 is an apocalyptic number.

It is an amenable number.

21346344305 is a deficient number, since it is larger than the sum of its proper divisors (8747523919).

21346344305 is a wasteful number, since it uses less digits than its factorization.

21346344305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29855056.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 21346344305 in words is "twenty-one billion, three hundred forty-six million, three hundred forty-four thousand, three hundred five".