20330990 has 16 divisors (see below), whose sum is σ = 36823248. Its totient is φ = 8081856.

The previous prime is 20330971. The next prime is 20330993. The reversal of 20330990 is 9903302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330993) 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, 4607 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (2301453).

Almost surely, 2^20330990 is an apocalyptic number.

20330990 is a deficient number, since it is larger than the sum of its proper divisors (16492258).

20330990 is a wasteful number, since it uses less digits than its factorization.

20330990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12643.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 20330990 is about 4508.9899090595. The cubic root of 20330990 is about 272.9309848039.

The spelling of 20330990 in words is "twenty million, three hundred thirty thousand, nine hundred ninety".