20004220402 has 8 divisors (see below), whose sum is σ = 30158647596. Its totient is φ = 9951337872.

The previous prime is 20004220381. The next prime is 20004220403. The reversal of 20004220402 is 20402240002.

It can be written as a sum of positive squares in 2 ways, for example, as 18881233281 + 1122987121 = 137409^2 + 33511^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20004220403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25385673 + ... + 25386460.

Almost surely, 2^20004220402 is an apocalyptic number.

20004220402 is a deficient number, since it is larger than the sum of its proper divisors (10154427194).

20004220402 is a wasteful number, since it uses less digits than its factorization.

20004220402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50772332.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20004220402 its reverse (20402240002), we get a palindrome (40406460404).

The spelling of 20004220402 in words is "twenty billion, four million, two hundred twenty thousand, four hundred two".