1918266340 has 24 divisors (see below), whose sum is σ = 4029351480. Its totient is φ = 767117568.

The previous prime is 1918266331. The next prime is 1918266359. The reversal of 1918266340 is 436628191.

It can be written as a sum of positive squares in 4 ways, for example, as 475937856 + 1442328484 = 21816^2 + 37978^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1918266293 and 1918266302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94974 + ... + 113386.

It is an arithmetic number, because the mean of its divisors is an integer number (167889645).

Almost surely, 2^1918266340 is an apocalyptic number.

1918266340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1918266340 is an abundant number, since it is smaller than the sum of its proper divisors (2111085140).

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

1918266340 is a wasteful number, since it uses less digits than its factorization.

1918266340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23631 (or 23629 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1918266340 is about 43798.0175350438. The cubic root of 1918266340 is about 1242.5188005150.

The spelling of 1918266340 in words is "one billion, nine hundred eighteen million, two hundred sixty-six thousand, three hundred forty".