20306361 has 8 divisors (see below), whose sum is σ = 27124384. Its totient is φ = 13512960.

The previous prime is 20306359. The next prime is 20306369. The reversal of 20306361 is 16360302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20306361 - 2¹ = 20306359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20306369) 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, 4135 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (3390548).

Almost surely, 2^20306361 is an apocalyptic number.

It is an amenable number.

20306361 is a deficient number, since it is larger than the sum of its proper divisors (6818023).

20306361 is a wasteful number, since it uses less digits than its factorization.

20306361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20306361 is about 4506.2579819624. The cubic root of 20306361 is about 272.8207305663.

Adding to 20306361 its reverse (16360302), we get a palindrome (36666663).

The spelling of 20306361 in words is "twenty million, three hundred six thousand, three hundred sixty-one".