20030390 has 16 divisors (see below), whose sum is σ = 36490608. Its totient is φ = 7915296.

The previous prime is 20030383. The next prime is 20030407. The reversal of 20030390 is 9303002.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11237 + ... + 12896.

It is an arithmetic number, because the mean of its divisors is an integer number (2280663).

Almost surely, 2^20030390 is an apocalyptic number.

20030390 is a deficient number, since it is larger than the sum of its proper divisors (16460218).

20030390 is a wasteful number, since it uses less digits than its factorization.

20030390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24223.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 20030390 is about 4475.5323705678. The cubic root of 20030390 is about 271.5791773342.

Adding to 20030390 its reverse (9303002), we get a palindrome (29333392).

The spelling of 20030390 in words is "twenty million, thirty thousand, three hundred ninety".