20003640404 has 24 divisors (see below), whose sum is σ = 38201671200. Its totient is φ = 9089491680.

The previous prime is 20003640389. The next prime is 20003640451. The reversal of 20003640404 is 40404630002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20003640404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57542 + ... + 208130.

It is an arithmetic number, because the mean of its divisors is an integer number (1591736300).

Almost surely, 2^20003640404 is an apocalyptic number.

It is an amenable number.

20003640404 is a deficient number, since it is larger than the sum of its proper divisors (18198030796).

20003640404 is a wasteful number, since it uses less digits than its factorization.

20003640404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153623 (or 153621 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The spelling of 20003640404 in words is "twenty billion, three million, six hundred forty thousand, four hundred four".