20956036 has 24 divisors (see below), whose sum is σ = 40521600. Its totient is φ = 9432192.

The previous prime is 20956021. The next prime is 20956051. The reversal of 20956036 is 63065902.

It is an interprime number because it is at equal distance from previous prime (20956021) and next prime (20956051).

It is a junction number, because it is equal to n+sod(n) for n = 20955989 and 20956007.

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, 5136 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (1688400).

Almost surely, 2^20956036 is an apocalyptic number.

It is an amenable number.

20956036 is a deficient number, since it is larger than the sum of its proper divisors (19565564).

20956036 is a wasteful number, since it uses less digits than its factorization.

20956036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13443 (or 13441 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 20956036 is about 4577.7763160731. The cubic root of 20956036 is about 275.6997540118.

The spelling of 20956036 in words is "twenty million, nine hundred fifty-six thousand, thirty-six".