1818905442 has 32 divisors (see below), whose sum is σ = 3702620160. Its totient is φ = 595528320.

The previous prime is 1818905441. The next prime is 1818905447. The reversal of 1818905442 is 2445098181.

It is a super-3 number, since 3×1818905442³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1818905394 and 1818905403.

It is not an unprimeable number, because it can be changed into a prime (1818905441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293023 + ... + 299165.

It is an arithmetic number, because the mean of its divisors is an integer number (115706880).

Almost surely, 2^1818905442 is an apocalyptic number.

1818905442 is an abundant number, since it is smaller than the sum of its proper divisors (1883714718).

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

1818905442 is a wasteful number, since it uses less digits than its factorization.

1818905442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 1818905442 is about 42648.6276684256. The cubic root of 1818905442 is about 1220.6843428311.

The spelling of 1818905442 in words is "one billion, eight hundred eighteen million, nine hundred five thousand, four hundred forty-two".