21233622755 has 8 divisors (see below), whose sum is σ = 25497561024. Its totient is φ = 16975422400.

The previous prime is 21233622743. The next prime is 21233622757. The reversal of 21233622755 is 55722633212.

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

It is not a de Polignac number, because 21233622755 - 2⁸ = 21233622499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233622757) 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, 1426331 + ... + 1441140.

It is an arithmetic number, because the mean of its divisors is an integer number (3187195128).

Almost surely, 2^21233622755 is an apocalyptic number.

21233622755 is a deficient number, since it is larger than the sum of its proper divisors (4263938269).

21233622755 is a wasteful number, since it uses less digits than its factorization.

21233622755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868957.

The product of its digits is 151200, while the sum is 38.

The spelling of 21233622755 in words is "twenty-one billion, two hundred thirty-three million, six hundred twenty-two thousand, seven hundred fifty-five".