20608400002 has 8 divisors (see below), whose sum is σ = 30917626236. Its totient is φ = 10302524592.

The previous prime is 20608399979. The next prime is 20608400011. The reversal of 20608400002 is 20000480602.

It can be written as a sum of positive squares in 2 ways, for example, as 19810281001 + 798119001 = 140749^2 + 28251^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822273 + ... + 846964.

Almost surely, 2^20608400002 is an apocalyptic number.

20608400002 is a deficient number, since it is larger than the sum of its proper divisors (10309226234).

20608400002 is a wasteful number, since it uses less digits than its factorization.

20608400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675412.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20608400002 its reverse (20000480602), we get a palindrome (40608880604).

The spelling of 20608400002 in words is "twenty billion, six hundred eight million, four hundred thousand, two".