18415023960529 has 21 divisors (see below), whose sum is σ = 21485885892681. Its totient is φ = 15783044617620.

The previous prime is 18415023960497. The next prime is 18415023960601. The reversal of 18415023960529 is 92506932051481.

The square root of 18415023960529 is 4291273.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18415023960529 - 2⁵ = 18415023960497 is a prime.

It is a super-2 number, since 2×18415023960529² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18415023960529.

It is not an unprimeable number, because it can be changed into a prime (18415023960329) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1471900384 + ... + 1471912894.

It is an arithmetic number, because the mean of its divisors is an integer number (1023137423461).

Almost surely, 2^{18415023960529} is an apocalyptic number.

18415023960529 is the 4291273-rd square number.

18415023960529 is the 2145637-th centered octagonal number.

It is an amenable number.

18415023960529 is a deficient number, since it is larger than the sum of its proper divisors (3070861932152).

18415023960529 is an frugal number, since it uses more digits than its factorization.

18415023960529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25064 (or 12518 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 18415023960529 in words is "eighteen trillion, four hundred fifteen billion, twenty-three million, nine hundred sixty thousand, five hundred twenty-nine".