20433030 has 64 divisors (see below), whose sum is σ = 51314688. Its totient is φ = 5201280.

The previous prime is 20433013. The next prime is 20433043. The reversal of 20433030 is 3033402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118024 + ... + 118196.

It is an arithmetic number, because the mean of its divisors is an integer number (801792).

Almost surely, 2^20433030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20433030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25657344).

20433030 is an abundant number, since it is smaller than the sum of its proper divisors (30881658).

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

20433030 is a wasteful number, since it uses less digits than its factorization.

20433030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 20433030 is about 4520.2909198413. The cubic root of 20433030 is about 273.3868310250.

Adding to 20433030 its reverse (3033402), we get a palindrome (23466432).

The spelling of 20433030 in words is "twenty million, four hundred thirty-three thousand, thirty".