20011819602 has 16 divisors (see below), whose sum is σ = 40025374272. Its totient is φ = 6670317360.

The previous prime is 20011819573. The next prime is 20011819613. The reversal of 20011819602 is 20691811002.

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 20011819602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114952 + ... + 230732.

It is an arithmetic number, because the mean of its divisors is an integer number (2501585892).

Almost surely, 2^20011819602 is an apocalyptic number.

20011819602 is an abundant number, since it is smaller than the sum of its proper divisors (20013554670).

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

20011819602 is a wasteful number, since it uses less digits than its factorization.

20011819602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144593.

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 20011819602 in words is "twenty billion, eleven million, eight hundred nineteen thousand, six hundred two".