20030940 has 72 divisors (see below), whose sum is σ = 63969360. Its totient is φ = 5059584.

The previous prime is 20030939. The next prime is 20030957. The reversal of 20030940 is 4903002.

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

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 492 + ... + 6348.

Almost surely, 2^20030940 is an apocalyptic number.

20030940 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 20030940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31984680).

20030940 is an abundant number, since it is smaller than the sum of its proper divisors (43938420).

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

20030940 is a wasteful number, since it uses less digits than its factorization.

20030940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20030940 is about 4475.5938153501. The cubic root of 20030940 is about 271.5816630102.

Adding to 20030940 its reverse (4903002), we get a palindrome (24933942).

The spelling of 20030940 in words is "twenty million, thirty thousand, nine hundred forty".