20400002066604 has 12 divisors (see below), whose sum is σ = 47600004822104. Its totient is φ = 6800000688864.

The previous prime is 20400002066603. The next prime is 20400002066617. The reversal of 20400002066604 is 40666020000402.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20400002066603) 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, 850000086097 + ... + 850000086120.

Almost surely, 2^{20400002066604} is an apocalyptic number.

It is an amenable number.

20400002066604 is an abundant number, since it is smaller than the sum of its proper divisors (27200002755500).

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

20400002066604 is a wasteful number, since it uses less digits than its factorization.

20400002066604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700000172224 (or 1700000172222 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20400002066604 in words is "twenty trillion, four hundred billion, two million, sixty-six thousand, six hundred four".