1818134740 has 24 divisors (see below), whose sum is σ = 3818966760. Its totient is φ = 727085568.

The previous prime is 1818134687. The next prime is 1818134761. The reversal of 1818134740 is 474318181.

It can be written as a sum of positive squares in 4 ways, for example, as 61183684 + 1756951056 = 7822^2 + 41916^2 .

It is a super-2 number, since 2×1818134740² = 6611227865589735200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1818134740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113976 + ... + 128944.

It is an arithmetic number, because the mean of its divisors is an integer number (159123615).

Almost surely, 2^1818134740 is an apocalyptic number.

1818134740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818134740 is an abundant number, since it is smaller than the sum of its proper divisors (2000832020).

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

1818134740 is a wasteful number, since it uses less digits than its factorization.

1818134740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051 (or 21049 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1818134740 is about 42639.5912269337. The cubic root of 1818134740 is about 1220.5119100501.

The spelling of 1818134740 in words is "one billion, eight hundred eighteen million, one hundred thirty-four thousand, seven hundred forty".