20782992 has 20 divisors (see below), whose sum is σ = 53689520. Its totient is φ = 6927648.

The previous prime is 20782987. The next prime is 20782999. The reversal of 20782992 is 29928702.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20782992.

It is not an unprimeable number, because it can be changed into a prime (20782999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 216442 + ... + 216537.

It is an arithmetic number, because the mean of its divisors is an integer number (2684476).

Almost surely, 2^20782992 is an apocalyptic number.

It is an amenable number.

20782992 is an abundant number, since it is smaller than the sum of its proper divisors (32906528).

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

20782992 is a wasteful number, since it uses less digits than its factorization.

20782992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432990 (or 432984 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20782992 is about 4558.8366937191. The cubic root of 20782992 is about 274.9387940921.

The spelling of 20782992 in words is "twenty million, seven hundred eighty-two thousand, nine hundred ninety-two".