18499895971072 has 144 divisors (see below), whose sum is σ = 37619761132800. Its totient is φ = 9078048645120.

The previous prime is 18499895971027. The next prime is 18499895971079. The reversal of 18499895971072 is 27017959899481.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is a junction number, because it is equal to n+sod(n) for n = 18499895970983 and 18499895971001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499895971079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8012080254 + ... + 8012082562.

It is an arithmetic number, because the mean of its divisors is an integer number (261248341200).

Almost surely, 2^{18499895971072} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18499895971072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18809880566400).

18499895971072 is an abundant number, since it is smaller than the sum of its proper divisors (19119865161728).

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

18499895971072 is a wasteful number, since it uses less digits than its factorization.

18499895971072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612 (or 4598 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 79.

The spelling of 18499895971072 in words is "eighteen trillion, four hundred ninety-nine billion, eight hundred ninety-five million, nine hundred seventy-one thousand, seventy-two".