18032720225415 has 64 divisors (see below), whose sum is σ = 33085497876480. Its totient is φ = 8215707553920.

The previous prime is 18032720225389. The next prime is 18032720225417. The reversal of 18032720225415 is 51452202723081.

It is not a de Polignac number, because 18032720225415 - 2⁵ = 18032720225383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18032720225417) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74169600 + ... + 74412330.

It is an arithmetic number, because the mean of its divisors is an integer number (516960904320).

Almost surely, 2^{18032720225415} is an apocalyptic number.

18032720225415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18032720225415 is a deficient number, since it is larger than the sum of its proper divisors (15052777651065).

18032720225415 is a wasteful number, since it uses less digits than its factorization.

18032720225415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245132.

The product of its (nonzero) digits is 268800, while the sum is 42.

Adding to 18032720225415 its reverse (51452202723081), we get a palindrome (69484922948496).

The spelling of 18032720225415 in words is "eighteen trillion, thirty-two billion, seven hundred twenty million, two hundred twenty-five thousand, four hundred fifteen".