20950389 has 24 divisors (see below), whose sum is σ = 31775744. Its totient is φ = 13284000.

The previous prime is 20950367. The next prime is 20950393. The reversal of 20950389 is 98305902.

It is not a de Polignac number, because 20950389 - 2⁵ = 20950357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950289) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 16404 + ... + 17634.

Almost surely, 2^20950389 is an apocalyptic number.

It is an amenable number.

20950389 is a deficient number, since it is larger than the sum of its proper divisors (10825355).

20950389 is a wasteful number, since it uses less digits than its factorization.

20950389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20950389 is about 4577.1594903390. The cubic root of 20950389 is about 275.6749876171.

The spelling of 20950389 in words is "twenty million, nine hundred fifty thousand, three hundred eighty-nine".