20290330 has 8 divisors (see below), whose sum is σ = 36522612. Its totient is φ = 8116128.

The previous prime is 20290327. The next prime is 20290331. The reversal of 20290330 is 3309202.

It can be written as a sum of positive squares in 2 ways, for example, as 20259001 + 31329 = 4501^2 + 177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20290330³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20290298 and 20290307.

It is not an unprimeable number, because it can be changed into a prime (20290331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1014507 + ... + 1014526.

Almost surely, 2^20290330 is an apocalyptic number.

20290330 is a deficient number, since it is larger than the sum of its proper divisors (16232282).

20290330 is a wasteful number, since it uses less digits than its factorization.

20290330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029040.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 20290330 is about 4504.4788821794. The cubic root of 20290330 is about 272.7489182483.

Adding to 20290330 its reverse (3309202), we get a palindrome (23599532).

The spelling of 20290330 in words is "twenty million, two hundred ninety thousand, three hundred thirty".