20956012 has 48 divisors (see below), whose sum is σ = 48142080. Its totient is φ = 7732800.

The previous prime is 20956003. The next prime is 20956021. The reversal of 20956012 is 21065902.

It is an interprime number because it is at equal distance from previous prime (20956003) and next prime (20956021).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4062 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (1002960).

Almost surely, 2^20956012 is an apocalyptic number.

20956012 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 20956012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24071040).

20956012 is an abundant number, since it is smaller than the sum of its proper divisors (27186068).

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

20956012 is a wasteful number, since it uses less digits than its factorization.

20956012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20956012 is about 4577.7736947123. The cubic root of 20956012 is about 275.6996487629.

The spelling of 20956012 in words is "twenty million, nine hundred fifty-six thousand, twelve".