20878082 has 4 divisors (see below), whose sum is σ = 31317126. Its totient is φ = 10439040.

The previous prime is 20878079. The next prime is 20878087. The reversal of 20878082 is 28087802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28087802 = 2 ⋅14043901.

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 9174841 = 3421^2 + 3029^2 .

It is not an unprimeable number, because it can be changed into a prime (20878087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5219519 + ... + 5219522.

Almost surely, 2^20878082 is an apocalyptic number.

20878082 is a deficient number, since it is larger than the sum of its proper divisors (10439044).

20878082 is a wasteful number, since it uses less digits than its factorization.

20878082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439043.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 20878082 is about 4569.2539872500. The cubic root of 20878082 is about 275.3574723107.

The spelling of 20878082 in words is "twenty million, eight hundred seventy-eight thousand, eighty-two".