20267312 has 40 divisors (see below), whose sum is σ = 42653520. Its totient is φ = 9273600.

The previous prime is 20267297. The next prime is 20267321. The reversal of 20267312 is 21376202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28562 + ... + 29262.

It is an arithmetic number, because the mean of its divisors is an integer number (1066338).

Almost surely, 2^20267312 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 20267312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21326760).

20267312 is an abundant number, since it is smaller than the sum of its proper divisors (22386208).

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

20267312 is a wasteful number, since it uses less digits than its factorization.

20267312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20267312 is about 4501.9231446128. The cubic root of 20267312 is about 272.6457408540.

The spelling of 20267312 in words is "twenty million, two hundred sixty-seven thousand, three hundred twelve".