20882990 has 16 divisors (see below), whose sum is σ = 37681200. Its totient is φ = 8332800.

The previous prime is 20882977. The next prime is 20883001. The reversal of 20882990 is 9928802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165 + ... + 6815.

It is an arithmetic number, because the mean of its divisors is an integer number (2355075).

Almost surely, 2^20882990 is an apocalyptic number.

20882990 is a deficient number, since it is larger than the sum of its proper divisors (16798210).

20882990 is a wasteful number, since it uses less digits than its factorization.

20882990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 20882990 is about 4569.7910236684. The cubic root of 20882990 is about 275.3790475459.

The spelling of 20882990 in words is "twenty million, eight hundred eighty-two thousand, nine hundred ninety".