18942428333 has 4 divisors (see below), whose sum is σ = 19091581440. Its totient is φ = 18793275228.

The previous prime is 18942428311. The next prime is 18942428353. The reversal of 18942428333 is 33382424981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33382424981 = 36061 ⋅925721.

It is a cyclic number.

It is not a de Polignac number, because 18942428333 - 2¹⁴ = 18942411949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942428303) 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, 74576363 + ... + 74576616.

It is an arithmetic number, because the mean of its divisors is an integer number (4772895360).

Almost surely, 2^18942428333 is an apocalyptic number.

It is an amenable number.

18942428333 is a deficient number, since it is larger than the sum of its proper divisors (149153107).

18942428333 is a wasteful number, since it uses less digits than its factorization.

18942428333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149153106.

The product of its digits is 995328, while the sum is 47.

The spelling of 18942428333 in words is "eighteen billion, nine hundred forty-two million, four hundred twenty-eight thousand, three hundred thirty-three".