20782936 has 8 divisors (see below), whose sum is σ = 38968020. Its totient is φ = 10391464.

The previous prime is 20782919. The next prime is 20782939. The reversal of 20782936 is 63928702.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20782895 and 20782904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20782939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298926 + ... + 1298941.

Almost surely, 2^20782936 is an apocalyptic number.

It is an amenable number.

20782936 is a deficient number, since it is larger than the sum of its proper divisors (18185084).

20782936 is a wasteful number, since it uses less digits than its factorization.

20782936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597873 (or 2597869 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20782936 is about 4558.8305517972. The cubic root of 20782936 is about 274.9385471500.

The spelling of 20782936 in words is "twenty million, seven hundred eighty-two thousand, nine hundred thirty-six".