18907828529 has 4 divisors (see below), whose sum is σ = 19135633776. Its totient is φ = 18680023284.

The previous prime is 18907828517. The next prime is 18907828547. The reversal of 18907828529 is 92582870981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92582870981 = 15451 ⋅5992031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18907828529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18907828559) 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, 113902499 + ... + 113902664.

It is an arithmetic number, because the mean of its divisors is an integer number (4783908444).

Almost surely, 2^18907828529 is an apocalyptic number.

It is an amenable number.

18907828529 is a deficient number, since it is larger than the sum of its proper divisors (227805247).

18907828529 is an equidigital number, since it uses as much as digits as its factorization.

18907828529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227805246.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 18907828529 in words is "eighteen billion, nine hundred seven million, eight hundred twenty-eight thousand, five hundred twenty-nine".