20882989 has 8 divisors (see below), whose sum is σ = 21111552. Its totient is φ = 20656080.

The previous prime is 20882977. The next prime is 20883001. The reversal of 20882989 is 98928802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20882977) and next prime (20883001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20882989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20882909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71127 + ... + 71419.

It is an arithmetic number, because the mean of its divisors is an integer number (2638944).

Almost surely, 2^20882989 is an apocalyptic number.

It is an amenable number.

20882989 is a deficient number, since it is larger than the sum of its proper divisors (228563).

20882989 is a wasteful number, since it uses less digits than its factorization.

20882989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 20882989 is about 4569.7909142542. The cubic root of 20882989 is about 275.3790431503.

The spelling of 20882989 in words is "twenty million, eight hundred eighty-two thousand, nine hundred eighty-nine".