20956236 has 48 divisors (see below), whose sum is σ = 56130816. Its totient is φ = 5961024.

The previous prime is 20956211. The next prime is 20956261. The reversal of 20956236 is 63265902.

It is an interprime number because it is at equal distance from previous prime (20956211) and next prime (20956261).

It is a junction number, because it is equal to n+sod(n) for n = 20956197 and 20956206.

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 15 ways as a sum of consecutive naturals, for example, 26235 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (1169392).

Almost surely, 2^20956236 is an apocalyptic number.

It is an amenable number.

20956236 is an abundant number, since it is smaller than the sum of its proper divisors (35174580).

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

20956236 is a wasteful number, since it uses less digits than its factorization.

20956236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 20956236 is about 4577.7981606882. The cubic root of 20956236 is about 275.7006310825.

The spelling of 20956236 in words is "twenty million, nine hundred fifty-six thousand, two hundred thirty-six".