18500072188029 has 8 divisors (see below), whose sum is σ = 24667538314560. Its totient is φ = 12332993760096.

The previous prime is 18500072187979. The next prime is 18500072188051. The reversal of 18500072188029 is 92088127000581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18500072188029 - 2¹³ = 18500072179837 is a prime.

It is a super-2 number, since 2×18500072188029² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500072183029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96813289 + ... + 97004190.

It is an arithmetic number, because the mean of its divisors is an integer number (3083442289320).

Almost surely, 2^{18500072188029} is an apocalyptic number.

It is an amenable number.

18500072188029 is a deficient number, since it is larger than the sum of its proper divisors (6167466126531).

18500072188029 is a wasteful number, since it uses less digits than its factorization.

18500072188029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193849299.

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 18500072188029 in words is "eighteen trillion, five hundred billion, seventy-two million, one hundred eighty-eight thousand, twenty-nine".