21233300555 has 8 divisors (see below), whose sum is σ = 25482898944. Its totient is φ = 16984681600.

The previous prime is 21233300531. The next prime is 21233300587. The reversal of 21233300555 is 55500333212.

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

It is not a de Polignac number, because 21233300555 - 2¹⁶ = 21233235019 is a prime.

It is a Duffinian number.

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, 196286 + ... + 284595.

It is an arithmetic number, because the mean of its divisors is an integer number (3185362368).

Almost surely, 2^21233300555 is an apocalyptic number.

21233300555 is a deficient number, since it is larger than the sum of its proper divisors (4249598389).

21233300555 is an equidigital number, since it uses as much as digits as its factorization.

21233300555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489717.

The product of its (nonzero) digits is 13500, while the sum is 29.

Adding to 21233300555 its reverse (55500333212), we get a palindrome (76733633767).

The spelling of 21233300555 in words is "twenty-one billion, two hundred thirty-three million, three hundred thousand, five hundred fifty-five".