20123286 has 8 divisors (see below), whose sum is σ = 40246584. Its totient is φ = 6707760.

The previous prime is 20123273. The next prime is 20123287. The reversal of 20123286 is 68232102.

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

20123286 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123287) 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, 1676935 + ... + 1676946.

It is an arithmetic number, because the mean of its divisors is an integer number (5030823).

Almost surely, 2^20123286 is an apocalyptic number.

20123286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20123286 is a wasteful number, since it uses less digits than its factorization.

20123286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353886.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20123286 is about 4485.8985721926. The cubic root of 20123286 is about 271.9983690069.

Adding to 20123286 its reverse (68232102), we get a palindrome (88355388).

The spelling of 20123286 in words is "twenty million, one hundred twenty-three thousand, two hundred eighty-six".