20009882 has 4 divisors (see below), whose sum is σ = 30014826. Its totient is φ = 10004940.

The previous prime is 20009863. The next prime is 20009887. The reversal of 20009882 is 28890002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28890002 = 2 ⋅14445001.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 1442401 = 4309^2 + 1201^2 .

It is not an unprimeable number, because it can be changed into a prime (20009887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002469 + ... + 5002472.

Almost surely, 2^20009882 is an apocalyptic number.

20009882 is a deficient number, since it is larger than the sum of its proper divisors (10004944).

20009882 is a wasteful number, since it uses less digits than its factorization.

20009882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10004943.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20009882 is about 4473.2406597455. The cubic root of 20009882 is about 271.4864607565.

Adding to 20009882 its reverse (28890002), we get a palindrome (48899884).

The spelling of 20009882 in words is "twenty million, nine thousand, eight hundred eighty-two".