402002002020 has 48 divisors (see below), whose sum is σ = 1141024872960. Its totient is φ = 105732032256.

The previous prime is 402002002019. The next prime is 402002002057. The reversal of 402002002020 is 20200200204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 402002001987 and 402002002005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45886260 + ... + 45895019.

It is an arithmetic number, because the mean of its divisors is an integer number (23771351520).

Almost surely, 2^402002002020 is an apocalyptic number.

It is an amenable number.

402002002020 is an abundant number, since it is smaller than the sum of its proper divisors (739022870940).

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

402002002020 is a wasteful number, since it uses less digits than its factorization.

402002002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91781364 (or 91781362 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 402002002020 its reverse (20200200204), we get a palindrome (422202202224).

The spelling of 402002002020 in words is "four hundred two billion, two million, two thousand, twenty".