16018989897436 has 24 divisors (see below), whose sum is σ = 29514792217680. Its totient is φ = 7586367167232.

The previous prime is 16018989897413. The next prime is 16018989897451. The reversal of 16018989897436 is 63479898981061.

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, 21512275 + ... + 22244458.

It is an arithmetic number, because the mean of its divisors is an integer number (1229783009070).

Almost surely, 2^{16018989897436} is an apocalyptic number.

It is an amenable number.

16018989897436 is a deficient number, since it is larger than the sum of its proper divisors (13495802320244).

16018989897436 is a wasteful number, since it uses less digits than its factorization.

16018989897436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43761573 (or 43761571 counting only the distinct ones).

The product of its (nonzero) digits is 1128701952, while the sum is 79.

The spelling of 16018989897436 in words is "sixteen trillion, eighteen billion, nine hundred eighty-nine million, eight hundred ninety-seven thousand, four hundred thirty-six".