20042010 has 48 divisors (see below), whose sum is σ = 52756704. Its totient is φ = 5278176.

The previous prime is 20041981. The next prime is 20042041. The reversal of 20042010 is 1024002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20041983 and 20042001.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6129 + ... + 8811.

It is an arithmetic number, because the mean of its divisors is an integer number (1099098).

Almost surely, 2^20042010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20042010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26378352).

20042010 is an abundant number, since it is smaller than the sum of its proper divisors (32714694).

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

20042010 is a wasteful number, since it uses less digits than its factorization.

20042010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20042010 is about 4476.8303519343. The cubic root of 20042010 is about 271.6316832182.

Adding to 20042010 its reverse (1024002), we get a palindrome (21066012).

The spelling of 20042010 in words is "twenty million, forty-two thousand, ten".