16020446636 has 6 divisors (see below), whose sum is σ = 28035781620. Its totient is φ = 8010223316.

The previous prime is 16020446627. The next prime is 16020446647. The reversal of 16020446636 is 63664402061.

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 16020446636.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002555826 + ... + 2002555833.

It is an arithmetic number, because the mean of its divisors is an integer number (4672630270).

Almost surely, 2^16020446636 is an apocalyptic number.

It is an amenable number.

16020446636 is a deficient number, since it is larger than the sum of its proper divisors (12015334984).

16020446636 is a wasteful number, since it uses less digits than its factorization.

16020446636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005111663 (or 4005111661 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 16020446636 its reverse (63664402061), we get a palindrome (79684848697).

The spelling of 16020446636 in words is "sixteen billion, twenty million, four hundred forty-six thousand, six hundred thirty-six".