1418218491 has 4 divisors (see below), whose sum is σ = 1890957992. Its totient is φ = 945478992.

The previous prime is 1418218481. The next prime is 1418218493. The reversal of 1418218491 is 1948128141.

1418218491 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1418218491 - 2⁷ = 1418218363 is a prime.

It is a super-2 number, since 2×1418218491² = 4022687376428634162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1418218493) 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, 236369746 + ... + 236369751.

It is an arithmetic number, because the mean of its divisors is an integer number (472739498).

Almost surely, 2^1418218491 is an apocalyptic number.

1418218491 is a deficient number, since it is larger than the sum of its proper divisors (472739501).

1418218491 is an equidigital number, since it uses as much as digits as its factorization.

1418218491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472739500.

The product of its digits is 18432, while the sum is 39.

The square root of 1418218491 is about 37659.2417740984. The cubic root of 1418218491 is about 1123.5206209949.

The spelling of 1418218491 in words is "one billion, four hundred eighteen million, two hundred eighteen thousand, four hundred ninety-one".