21474266305 has 16 divisors (see below), whose sum is σ = 26214637824. Its totient is φ = 16883930560.

The previous prime is 21474266293. The next prime is 21474266309. The reversal of 21474266305 is 50366247412.

It is not a de Polignac number, because 21474266305 - 2¹⁵ = 21474233537 is a prime.

It is a super-2 number, since 2×21474266305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21474266309) 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, 17124 + ... + 207946.

It is an arithmetic number, because the mean of its divisors is an integer number (1638414864).

Almost surely, 2^21474266305 is an apocalyptic number.

It is an amenable number.

21474266305 is a deficient number, since it is larger than the sum of its proper divisors (4740371519).

21474266305 is a wasteful number, since it uses less digits than its factorization.

21474266305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191216.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 21474266305 in words is "twenty-one billion, four hundred seventy-four million, two hundred sixty-six thousand, three hundred five".