18069521428 has 48 divisors (see below), whose sum is σ = 38313124864. Its totient is φ = 7291710720.

The previous prime is 18069521329. The next prime is 18069521489. The reversal of 18069521428 is 82412596081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249201 + ... + 313432.

Almost surely, 2^18069521428 is an apocalyptic number.

It is an amenable number.

18069521428 is an abundant number, since it is smaller than the sum of its proper divisors (20243603436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18069521428 is a wasteful number, since it uses less digits than its factorization.

18069521428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562712 (or 562710 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 18069521428 in words is "eighteen billion, sixty-nine million, five hundred twenty-one thousand, four hundred twenty-eight".