20230686 has 48 divisors (see below), whose sum is σ = 50354304. Its totient is φ = 5750352.

The previous prime is 20230667. The next prime is 20230741. The reversal of 20230686 is 68603202.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38421 + ... + 38943.

It is an arithmetic number, because the mean of its divisors is an integer number (1049048).

Almost surely, 2^20230686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20230686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25177152).

20230686 is an abundant number, since it is smaller than the sum of its proper divisors (30123618).

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

20230686 is a wasteful number, since it uses less digits than its factorization.

20230686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20230686 is about 4497.8534880541. The cubic root of 20230686 is about 272.4814048978.

Adding to 20230686 its reverse (68603202), we get a palindrome (88833888).

The spelling of 20230686 in words is "twenty million, two hundred thirty thousand, six hundred eighty-six".