18894528069 has 16 divisors (see below), whose sum is σ = 25428909312. Its totient is φ = 12478366208.

The previous prime is 18894528061. The next prime is 18894528071. The reversal of 18894528069 is 96082549881.

It is a cyclic number.

It is not a de Polignac number, because 18894528069 - 2³ = 18894528061 is a prime.

It is a super-2 number, since 2×18894528069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894528061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685849 + ... + 712865.

It is an arithmetic number, because the mean of its divisors is an integer number (1589306832).

Almost surely, 2^18894528069 is an apocalyptic number.

It is an amenable number.

18894528069 is a deficient number, since it is larger than the sum of its proper divisors (6534381243).

18894528069 is a wasteful number, since it uses less digits than its factorization.

18894528069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29196.

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 18894528069 in words is "eighteen billion, eight hundred ninety-four million, five hundred twenty-eight thousand, sixty-nine".