21747323035 has 8 divisors (see below), whose sum is σ = 26120714256. Its totient is φ = 17381907360.

The previous prime is 21747323011. The next prime is 21747323053. The reversal of 21747323035 is 53032374712.

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

It is not a de Polignac number, because 21747323035 - 2¹⁵ = 21747290267 is a prime.

It is a super-2 number, since 2×21747323035² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21747322985 and 21747323003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987884 + ... + 1998793.

It is an arithmetic number, because the mean of its divisors is an integer number (3265089282).

Almost surely, 2^21747323035 is an apocalyptic number.

21747323035 is a deficient number, since it is larger than the sum of its proper divisors (4373391221).

21747323035 is a wasteful number, since it uses less digits than its factorization.

21747323035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987773.

The product of its (nonzero) digits is 105840, while the sum is 37.

Adding to 21747323035 its reverse (53032374712), we get a palindrome (74779697747).

The spelling of 21747323035 in words is "twenty-one billion, seven hundred forty-seven million, three hundred twenty-three thousand, thirty-five".