20306364 has 144 divisors (see below), whose sum is σ = 59028480. Its totient is φ = 5391360.

The previous prime is 20306359. The next prime is 20306369. The reversal of 20306364 is 46360302.

It is an interprime number because it is at equal distance from previous prime (20306359) and next prime (20306369).

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 655029 + ... + 655059.

It is an arithmetic number, because the mean of its divisors is an integer number (409920).

Almost surely, 2^20306364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20306364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29514240).

20306364 is an abundant number, since it is smaller than the sum of its proper divisors (38722116).

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

20306364 is a wasteful number, since it uses less digits than its factorization.

20306364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20306364 is about 4506.2583148328. The cubic root of 20306364 is about 272.8207440015.

Adding to 20306364 its reverse (46360302), we get a palindrome (66666666).

The spelling of 20306364 in words is "twenty million, three hundred six thousand, three hundred sixty-four".