1818402133 has 8 divisors (see below), whose sum is σ = 1831377600. Its totient is φ = 1805471328.

The previous prime is 1818402121. The next prime is 1818402169. The reversal of 1818402133 is 3312048181.

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 1818402133 - 2¹⁷ = 1818271061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1818402095 and 1818402104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818403133) 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, 72778 + ... + 94516.

It is an arithmetic number, because the mean of its divisors is an integer number (228922200).

Almost surely, 2^1818402133 is an apocalyptic number.

It is an amenable number.

1818402133 is a deficient number, since it is larger than the sum of its proper divisors (12975467).

1818402133 is a wasteful number, since it uses less digits than its factorization.

1818402133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22331.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1818402133 is about 42642.7266131048. The cubic root of 1818402133 is about 1220.5717406623.

The spelling of 1818402133 in words is "one billion, eight hundred eighteen million, four hundred two thousand, one hundred thirty-three".