18799925487473 has 4 divisors (see below), whose sum is σ = 20246073601908. Its totient is φ = 17353777373040.

The previous prime is 18799925487439. The next prime is 18799925487487. The reversal of 18799925487473 is 37478452999781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3533768348224 + 15266157139249 = 1879832^2 + 3907193^2 .

It is a cyclic number.

It is not a de Polignac number, because 18799925487473 - 2⁴² = 14401878976369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18799925487391 and 18799925487400.

It is not an unprimeable number, because it can be changed into a prime (18799925487173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723074057198 + ... + 723074057223.

It is an arithmetic number, because the mean of its divisors is an integer number (5061518400477).

Almost surely, 2^{18799925487473} is an apocalyptic number.

18799925487473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18799925487473 is a deficient number, since it is larger than the sum of its proper divisors (1446148114435).

18799925487473 is a wasteful number, since it uses less digits than its factorization.

18799925487473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446148114434.

The product of its digits is 7681443840, while the sum is 83.

The spelling of 18799925487473 in words is "eighteen trillion, seven hundred ninety-nine billion, nine hundred twenty-five million, four hundred eighty-seven thousand, four hundred seventy-three".