20121330 has 16 divisors (see below), whose sum is σ = 48291264. Its totient is φ = 5365680.

The previous prime is 20121307. The next prime is 20121337. The reversal of 20121330 is 3312102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20121337) 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, 335326 + ... + 335385.

It is an arithmetic number, because the mean of its divisors is an integer number (3018204).

Almost surely, 2^20121330 is an apocalyptic number.

20121330 is an abundant number, since it is smaller than the sum of its proper divisors (28169934).

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

20121330 is a wasteful number, since it uses less digits than its factorization.

20121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670721.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20121330 is about 4485.6805503736. The cubic root of 20121330 is about 271.9895558994.

Adding to 20121330 its reverse (3312102), we get a palindrome (23433432).

The spelling of 20121330 in words is "twenty million, one hundred twenty-one thousand, three hundred thirty".