20090630 has 32 divisors (see below), whose sum is σ = 42451776. Its totient is φ = 6701184.

The previous prime is 20090627. The next prime is 20090647. The reversal of 20090630 is 3609002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289 + ... + 6468.

It is an arithmetic number, because the mean of its divisors is an integer number (1326618).

Almost surely, 2^20090630 is an apocalyptic number.

20090630 is an abundant number, since it is smaller than the sum of its proper divisors (22361146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20090630 is a wasteful number, since it uses less digits than its factorization.

20090630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20090630 is about 4482.2572438449. The cubic root of 20090630 is about 271.8511566706.

Adding to 20090630 its reverse (3609002), we get a palindrome (23699632).

The spelling of 20090630 in words is "twenty million, ninety thousand, six hundred thirty".