9018840349 has 4 divisors (see below), whose sum is σ = 9108135900. Its totient is φ = 8929544800.

The previous prime is 9018840329. The next prime is 9018840361. The reversal of 9018840349 is 9430488109.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6802125625 + 2216714724 = 82475^2 + 47082^2 .

It is a cyclic number.

It is not a de Polignac number, because 9018840349 - 2¹⁷ = 9018709277 is a prime.

It is a super-4 number, since 4×9018840349⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9018840299 and 9018840308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9018840329) 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, 44647624 + ... + 44647825.

It is an arithmetic number, because the mean of its divisors is an integer number (2277033975).

Almost surely, 2^9018840349 is an apocalyptic number.

It is an amenable number.

9018840349 is a deficient number, since it is larger than the sum of its proper divisors (89295551).

9018840349 is a wasteful number, since it uses less digits than its factorization.

9018840349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89295550.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 9018840349 is about 94967.5752507139. The cubic root of 9018840349 is about 2081.5342745653.

The spelling of 9018840349 in words is "nine billion, eighteen million, eight hundred forty thousand, three hundred forty-nine".