20133330 has 32 divisors (see below), whose sum is σ = 55223424. Its totient is φ = 4601856.

The previous prime is 20133329. The next prime is 20133341. The reversal of 20133330 is 3333102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 47727 + ... + 48146.

It is an arithmetic number, because the mean of its divisors is an integer number (1725732).

Almost surely, 2^20133330 is an apocalyptic number.

20133330 is an abundant number, since it is smaller than the sum of its proper divisors (35090094).

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

20133330 is a wasteful number, since it uses less digits than its factorization.

20133330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95890.

The product of its (nonzero) digits is 162, while the sum is 15.

The square root of 20133330 is about 4487.0179406818. The cubic root of 20133330 is about 272.0436150504.

Adding to 20133330 its reverse (3333102), we get a palindrome (23466432).

The spelling of 20133330 in words is "twenty million, one hundred thirty-three thousand, three hundred thirty".