18948089628 has 36 divisors (see below), whose sum is σ = 51580911928. Its totient is φ = 5830181280.

The previous prime is 18948089627. The next prime is 18948089639. The reversal of 18948089628 is 82698084981.

18948089628 is a `hidden beast` number, since 18 + 9 + 480 + 89 + 62 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948089627) 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 11 ways as a sum of consecutive naturals, for example, 20243218 + ... + 20244153.

Almost surely, 2^18948089628 is an apocalyptic number.

18948089628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18948089628 is an abundant number, since it is smaller than the sum of its proper divisors (32632822300).

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

18948089628 is a wasteful number, since it uses less digits than its factorization.

18948089628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40487394 (or 40487389 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 18948089628 in words is "eighteen billion, nine hundred forty-eight million, eighty-nine thousand, six hundred twenty-eight".