18019680012 has 36 divisors (see below), whose sum is σ = 46721305960. Its totient is φ = 6006094992.

The previous prime is 18019679959. The next prime is 18019680017. The reversal of 18019680012 is 21008691081.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18019680017) 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, 1388578 + ... + 1401494.

Almost surely, 2^18019680012 is an apocalyptic number.

18019680012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18019680012 is an abundant number, since it is smaller than the sum of its proper divisors (28701625948).

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

18019680012 is an frugal number, since it uses more digits than its factorization.

18019680012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25847 (or 12922 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

Multiplying 18019680012 by its product of nonzero digits (6912), we get a square (124552028242944 = 11160288²).

The spelling of 18019680012 in words is "eighteen billion, nineteen million, six hundred eighty thousand, twelve".