1218442013 has 8 divisors (see below), whose sum is σ = 1283025120. Its totient is φ = 1153904400.

The previous prime is 1218441947. The next prime is 1218442031. The reversal of 1218442013 is 3102448121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218442013 - 2¹⁸ = 1218179869 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 (1218442913) 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, 53006 + ... + 72432.

It is an arithmetic number, because the mean of its divisors is an integer number (160378140).

Almost surely, 2^1218442013 is an apocalyptic number.

It is an amenable number.

1218442013 is a deficient number, since it is larger than the sum of its proper divisors (64583107).

1218442013 is a wasteful number, since it uses less digits than its factorization.

1218442013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22747.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1218442013 is about 34906.1887492748. The cubic root of 1218442013 is about 1068.0746851805.

The spelling of 1218442013 in words is "one billion, two hundred eighteen million, four hundred forty-two thousand, thirteen".