20956312 has 32 divisors (see below), whose sum is σ = 44160480. Its totient is φ = 9250560.

The previous prime is 20956307. The next prime is 20956321. The reversal of 20956312 is 21365902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1989 + ... + 6772.

It is an arithmetic number, because the mean of its divisors is an integer number (1380015).

Almost surely, 2^20956312 is an apocalyptic number.

It is an amenable number.

20956312 is an abundant number, since it is smaller than the sum of its proper divisors (23204168).

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

20956312 is a wasteful number, since it uses less digits than its factorization.

20956312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803 (or 8799 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 20956312 is about 4577.8064616146. The cubic root of 20956312 is about 275.7009643679.

The spelling of 20956312 in words is "twenty million, nine hundred fifty-six thousand, three hundred twelve".