18039997980216 has 48 divisors (see below), whose sum is σ = 48991456893600. Its totient is φ = 5996947548672.

The previous prime is 18039997980211. The next prime is 18039997980241. The reversal of 18039997980216 is 61208979993081.

18039997980216 is a `hidden beast` number, since 1 + 80 + 399 + 9 + 79 + 80 + 2 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039997980211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341329881 + ... + 341382728.

It is an arithmetic number, because the mean of its divisors is an integer number (1020655351950).

Almost surely, 2^{18039997980216} is an apocalyptic number.

It is an amenable number.

18039997980216 is an abundant number, since it is smaller than the sum of its proper divisors (30951458913384).

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

18039997980216 is a wasteful number, since it uses less digits than its factorization.

18039997980216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682712988 (or 682712981 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 72.

The spelling of 18039997980216 in words is "eighteen trillion, thirty-nine billion, nine hundred ninety-seven million, nine hundred eighty thousand, two hundred sixteen".