20081930 has 32 divisors (see below), whose sum is σ = 41757120. Its totient is φ = 6872320.

The previous prime is 20081911. The next prime is 20081939. The reversal of 20081930 is 3918002.

It is a junction number, because it is equal to n+sod(n) for n = 20081896 and 20081905.

It is not an unprimeable number, because it can be changed into a prime (20081939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3500 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (1304910).

Almost surely, 2^20081930 is an apocalyptic number.

20081930 is an abundant number, since it is smaller than the sum of its proper divisors (21675190).

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

20081930 is a wasteful number, since it uses less digits than its factorization.

20081930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20081930 is about 4481.2866455963. The cubic root of 20081930 is about 271.8119104061.

Adding to 20081930 its sum of digits (23), we get a triangular number (20081953 = T₆₃₃₇).

Adding to 20081930 its reverse (3918002), we get a palindrome (23999932).

The spelling of 20081930 in words is "twenty million, eighty-one thousand, nine hundred thirty".