20989652 has 12 divisors (see below), whose sum is σ = 36898176. Its totient is φ = 10447320.

The previous prime is 20989651. The next prime is 20989711. The reversal of 20989652 is 25698902.

It is a super-2 number, since 2×20989652² = 881130982162208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20989651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10874 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (3074848).

Almost surely, 2^20989652 is an apocalyptic number.

It is an amenable number.

20989652 is a deficient number, since it is larger than the sum of its proper divisors (15908524).

20989652 is a wasteful number, since it uses less digits than its factorization.

20989652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23758 (or 23756 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 20989652 is about 4581.4464964681. The cubic root of 20989652 is about 275.8470937683.

The spelling of 20989652 in words is "twenty million, nine hundred eighty-nine thousand, six hundred fifty-two".