20118361 has 8 divisors (see below), whose sum is σ = 21542760. Its totient is φ = 18720768.

The previous prime is 20118341. The next prime is 20118379. The reversal of 20118361 is 16381102.

It can be written as a sum of positive squares in 4 ways, for example, as 3136 + 20115225 = 56^2 + 4485^2 .

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 20118361 - 2¹³ = 20110169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20118311) 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, 5136 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (2692845).

Almost surely, 2^20118361 is an apocalyptic number.

It is an amenable number.

20118361 is a deficient number, since it is larger than the sum of its proper divisors (1424399).

20118361 is a wasteful number, since it uses less digits than its factorization.

20118361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13403.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 20118361 is about 4485.3495961853. The cubic root of 20118361 is about 271.9761774479.

Adding to 20118361 its reverse (16381102), we get a palindrome (36499463).

The spelling of 20118361 in words is "twenty million, one hundred eighteen thousand, three hundred sixty-one".