19855033223 has 4 divisors (see below), whose sum is σ = 20339302368. Its totient is φ = 19370764080.

The previous prime is 19855033217. The next prime is 19855033271. The reversal of 19855033223 is 32233055891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19855033223 - 2⁴ = 19855033207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 484269103 = 19855033223 / (1 + 9 + 8 + 5 + 5 + 0 + 3 + 3 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19855033273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242134511 + ... + 242134592.

It is an arithmetic number, because the mean of its divisors is an integer number (5084825592).

Almost surely, 2^19855033223 is an apocalyptic number.

19855033223 is a deficient number, since it is larger than the sum of its proper divisors (484269145).

19855033223 is an equidigital number, since it uses as much as digits as its factorization.

19855033223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484269144.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 19855033223 in words is "nineteen billion, eight hundred fifty-five million, thirty-three thousand, two hundred twenty-three".