21747350959 has 8 divisors (see below), whose sum is σ = 21827391872. Its totient is φ = 21667457880.

The previous prime is 21747350951. The next prime is 21747350969. The reversal of 21747350959 is 95905374712.

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 21747350959 - 2³ = 21747350951 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 (21747350951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262222 + ... + 335044.

It is an arithmetic number, because the mean of its divisors is an integer number (2728423984).

Almost surely, 2^21747350959 is an apocalyptic number.

21747350959 is a deficient number, since it is larger than the sum of its proper divisors (80040913).

21747350959 is an equidigital number, since it uses as much as digits as its factorization.

21747350959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73917.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 21747350959 in words is "twenty-one billion, seven hundred forty-seven million, three hundred fifty thousand, nine hundred fifty-nine".