20433330 has 32 divisors (see below), whose sum is σ = 54489600. Its totient is φ = 5448816.

The previous prime is 20433323. The next prime is 20433331. The reversal of 20433330 is 3333402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20433331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37570 + ... + 38109.

It is an arithmetic number, because the mean of its divisors is an integer number (1702800).

Almost surely, 2^20433330 is an apocalyptic number.

20433330 is an abundant number, since it is smaller than the sum of its proper divisors (34056270).

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

20433330 is a wasteful number, since it uses less digits than its factorization.

20433330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75695 (or 75689 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 18.

The square root of 20433330 is about 4520.3241034244. The cubic root of 20433330 is about 273.3881689837.

Adding to 20433330 its reverse (3333402), we get a palindrome (23766732).

The spelling of 20433330 in words is "twenty million, four hundred thirty-three thousand, three hundred thirty".