4002020002 has 4 divisors (see below), whose sum is σ = 6003030006. Its totient is φ = 2001010000.

The previous prime is 4002019949. The next prime is 4002020021. The reversal of 4002020002 is 2000202004.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 3204578881 + 797441121 = 56609^2 + 28239^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000504999 + ... + 1000505002.

Almost surely, 2^4002020002 is an apocalyptic number.

4002020002 is a deficient number, since it is larger than the sum of its proper divisors (2001010004).

4002020002 is a wasteful number, since it uses less digits than its factorization.

4002020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001010003.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 4002020002 is about 63261.5207057181. The cubic root of 4002020002 is about 1587.6682197749.

Adding to 4002020002 its reverse (2000202004), we get a palindrome (6002222006).

The spelling of 4002020002 in words is "four billion, two million, twenty thousand, two".