20723912 has 48 divisors (see below), whose sum is σ = 43411200. Its totient is φ = 9266400.

The previous prime is 20723891. The next prime is 20723921. The reversal of 20723912 is 21932702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76337 + ... + 76607.

It is an arithmetic number, because the mean of its divisors is an integer number (904400).

Almost surely, 2^20723912 is an apocalyptic number.

20723912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20723912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21705600).

20723912 is an abundant number, since it is smaller than the sum of its proper divisors (22687288).

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

20723912 is a wasteful number, since it uses less digits than its factorization.

20723912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20723912 is about 4552.3523589459. The cubic root of 20723912 is about 274.6780231687.

The spelling of 20723912 in words is "twenty million, seven hundred twenty-three thousand, nine hundred twelve".