21755734233063 has 8 divisors (see below), whose sum is σ = 29007671442048. Its totient is φ = 14503809923064.

The previous prime is 21755734233043. The next prime is 21755734233067. The reversal of 21755734233063 is 36033243755712.

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

It is not a de Polignac number, because 21755734233063 - 2⁸ = 21755734232807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21755734232997 and 21755734233015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21755734233067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852870 + ... + 6851612.

It is an arithmetic number, because the mean of its divisors is an integer number (3625958930256).

Almost surely, 2^{21755734233063} is an apocalyptic number.

21755734233063 is a deficient number, since it is larger than the sum of its proper divisors (7251937208985).

21755734233063 is a wasteful number, since it uses less digits than its factorization.

21755734233063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449493.

The product of its (nonzero) digits is 9525600, while the sum is 51.

Adding to 21755734233063 its reverse (36033243755712), we get a palindrome (57788977988775).

The spelling of 21755734233063 in words is "twenty-one trillion, seven hundred fifty-five billion, seven hundred thirty-four million, two hundred thirty-three thousand, sixty-three".