21063365347 has 16 divisors (see below), whose sum is σ = 23117940000. Its totient is φ = 19102164480.

The previous prime is 21063365333. The next prime is 21063365353. The reversal of 21063365347 is 74356336012.

It is a cyclic number.

It is not a de Polignac number, because 21063365347 - 2²³ = 21054976739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21063365317) 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, 203197 + ... + 288817.

It is an arithmetic number, because the mean of its divisors is an integer number (1444871250).

Almost surely, 2^21063365347 is an apocalyptic number.

21063365347 is a deficient number, since it is larger than the sum of its proper divisors (2054574653).

21063365347 is a wasteful number, since it uses less digits than its factorization.

21063365347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86166.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 21063365347 in words is "twenty-one billion, sixty-three million, three hundred sixty-five thousand, three hundred forty-seven".