4020042100 has 18 divisors (see below), whose sum is σ = 8723491574. Its totient is φ = 1608016800.

The previous prime is 4020042083. The next prime is 4020042121. The reversal of 4020042100 is 12400204.

It can be written as a sum of positive squares in 3 ways, for example, as 535737316 + 3484304784 = 23146^2 + 59028^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20100111 + ... + 20100310.

Almost surely, 2^4020042100 is an apocalyptic number.

It is an amenable number.

4020042100 is an abundant number, since it is smaller than the sum of its proper divisors (4703449474).

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

4020042100 is a wasteful number, since it uses less digits than its factorization.

4020042100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40200435 (or 40200428 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4020042100 is about 63403.8019364770. The cubic root of 4020042100 is about 1590.0478737744.

Adding to 4020042100 its reverse (12400204), we get a palindrome (4032442304).

The spelling of 4020042100 in words is "four billion, twenty million, forty-two thousand, one hundred".