20976936 has 32 divisors (see below), whose sum is σ = 52587360. Its totient is φ = 6972992.

The previous prime is 20976913. The next prime is 20976937. The reversal of 20976936 is 63967902.

It is not an unprimeable number, because it can be changed into a prime (20976937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9646 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (1643355).

Almost surely, 2^20976936 is an apocalyptic number.

It is an amenable number.

20976936 is an abundant number, since it is smaller than the sum of its proper divisors (31610424).

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

20976936 is a wasteful number, since it uses less digits than its factorization.

20976936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 20976936 is about 4580.0585149100. The cubic root of 20976936 is about 275.7913777385.

It can be divided in two parts, 20976 and 936, that added together give a palindrome (21912).

The spelling of 20976936 in words is "twenty million, nine hundred seventy-six thousand, nine hundred thirty-six".