20333420 has 48 divisors (see below), whose sum is σ = 45625440. Its totient is φ = 7589376.

The previous prime is 20333407. The next prime is 20333459. The reversal of 20333420 is 2433302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27374 + ... + 28106.

It is an arithmetic number, because the mean of its divisors is an integer number (950530).

Almost surely, 2^20333420 is an apocalyptic number.

20333420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20333420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22812720).

20333420 is an abundant number, since it is smaller than the sum of its proper divisors (25292020).

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

20333420 is a wasteful number, since it uses less digits than its factorization.

20333420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20333420 is about 4509.2593626892. The cubic root of 20333420 is about 272.9418581205.

Adding to 20333420 its reverse (2433302), we get a palindrome (22766722).

The spelling of 20333420 in words is "twenty million, three hundred thirty-three thousand, four hundred twenty".