1018218505438 has 8 divisors (see below), whose sum is σ = 1527408578880. Its totient is φ = 509082312480.

The previous prime is 1018218505429. The next prime is 1018218505477. The reversal of 1018218505438 is 8345058128101.

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

It is a super-3 number, since 3×1018218505438³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13422843 + ... + 13498486.

It is an arithmetic number, because the mean of its divisors is an integer number (190926072360).

Almost surely, 2^{1018218505438} is an apocalyptic number.

1018218505438 is a deficient number, since it is larger than the sum of its proper divisors (509190073442).

1018218505438 is a wasteful number, since it uses less digits than its factorization.

1018218505438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26940242.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 1018218505438 in words is "one trillion, eighteen billion, two hundred eighteen million, five hundred five thousand, four hundred thirty-eight".