402020204402 has 8 divisors (see below), whose sum is σ = 603335953836. Its totient is φ = 200908219792.

The previous prime is 402020204387. The next prime is 402020204477. The reversal of 402020204402 is 204402020204.

It can be written as a sum of positive squares in 2 ways, for example, as 389212529161 + 12807675241 = 623869^2 + 113171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50936273 + ... + 50944164.

Almost surely, 2^402020204402 is an apocalyptic number.

402020204402 is a deficient number, since it is larger than the sum of its proper divisors (201315749434).

402020204402 is a wasteful number, since it uses less digits than its factorization.

402020204402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101882412.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 402020204402 its reverse (204402020204), we get a palindrome (606422224606).

The spelling of 402020204402 in words is "four hundred two billion, twenty million, two hundred four thousand, four hundred two".