20042043 has 16 divisors (see below), whose sum is σ = 30858240. Its totient is φ = 11333376.

The previous prime is 20042041. The next prime is 20042047. The reversal of 20042043 is 34024002.

It is a happy number.

It is not a de Polignac number, because 20042043 - 2¹ = 20042041 is a prime.

It is a super-2 number, since 2×20042043² = 803366975227698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20042041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2883 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (1928640).

Almost surely, 2^20042043 is an apocalyptic number.

20042043 is a deficient number, since it is larger than the sum of its proper divisors (10816197).

20042043 is an equidigital number, since it uses as much as digits as its factorization.

20042043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20042043 is about 4476.8340375761. The cubic root of 20042043 is about 271.6318323024.

Adding to 20042043 its reverse (34024002), we get a palindrome (54066045).

The spelling of 20042043 in words is "twenty million, forty-two thousand, forty-three".