18333806442 has 16 divisors (see below), whose sum is σ = 41905843392. Its totient is φ = 5238230400.

The previous prime is 18333806429. The next prime is 18333806443. The reversal of 18333806442 is 24460833381.

It is a super-2 number, since 2×18333806442² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 436519201 = 18333806442 / (1 + 8 + 3 + 3 + 3 + 8 + 0 + 6 + 4 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 18333806394 and 18333806403.

It is not an unprimeable number, because it can be changed into a prime (18333806443) 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, 218259559 + ... + 218259642.

It is an arithmetic number, because the mean of its divisors is an integer number (2619115212).

Almost surely, 2^18333806442 is an apocalyptic number.

18333806442 is an abundant number, since it is smaller than the sum of its proper divisors (23572036950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18333806442 is a wasteful number, since it uses less digits than its factorization.

18333806442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436519213.

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 18333806442 in words is "eighteen billion, three hundred thirty-three million, eight hundred six thousand, four hundred forty-two".