20423330 has 32 divisors (see below), whose sum is σ = 38087280. Its totient is φ = 7879680.

The previous prime is 20423329. The next prime is 20423353. The reversal of 20423330 is 3332402.

It can be written as a sum of positive squares in 8 ways, for example, as 9247681 + 11175649 = 3041^2 + 3343^2 .

It is a super-2 number, since 2×20423330² = 834224816577800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423299 and 20423308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44462 + ... + 44918.

Almost surely, 2^20423330 is an apocalyptic number.

20423330 is a deficient number, since it is larger than the sum of its proper divisors (17663950).

20423330 is a wasteful number, since it uses less digits than its factorization.

20423330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20423330 is about 4519.2178526820. The cubic root of 20423330 is about 273.3435633028.

Adding to 20423330 its reverse (3332402), we get a palindrome (23755732).

The spelling of 20423330 in words is "twenty million, four hundred twenty-three thousand, three hundred thirty".