4021840202 has 4 divisors (see below), whose sum is σ = 6032760306. Its totient is φ = 2010920100.

The previous prime is 4021840187. The next prime is 4021840217. The reversal of 4021840202 is 2020481204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4021840187) and next prime (4021840217).

It can be written as a sum of positive squares in only one way, i.e., 3373170241 + 648669961 = 58079^2 + 25469^2 .

It is a super-2 number, since 2×4021840202² = 32350397220846801608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005460049 + ... + 1005460052.

Almost surely, 2^4021840202 is an apocalyptic number.

4021840202 is a deficient number, since it is larger than the sum of its proper divisors (2010920104).

4021840202 is a wasteful number, since it uses less digits than its factorization.

4021840202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010920103.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 4021840202 is about 63417.9801160523. The cubic root of 4021840202 is about 1590.2849062917.

The spelling of 4021840202 in words is "four billion, twenty-one million, eight hundred forty thousand, two hundred two".