20898782 has 4 divisors (see below), whose sum is σ = 31348176. Its totient is φ = 10449390.

The previous prime is 20898767. The next prime is 20898793. The reversal of 20898782 is 28789802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28789802 = 2 ⋅14394901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5224694 + ... + 5224697.

It is an arithmetic number, because the mean of its divisors is an integer number (7837044).

Almost surely, 2^20898782 is an apocalyptic number.

20898782 is a deficient number, since it is larger than the sum of its proper divisors (10449394).

20898782 is a wasteful number, since it uses less digits than its factorization.

20898782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10449393.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 20898782 is about 4571.5185660785. The cubic root of 20898782 is about 275.4484451781.

The spelling of 20898782 in words is "twenty million, eight hundred ninety-eight thousand, seven hundred eighty-two".