20189549548 has 24 divisors (see below), whose sum is σ = 41238231552. Its totient is φ = 8468564304.

The previous prime is 20189549467. The next prime is 20189549551. The reversal of 20189549548 is 84594598102.

It is a super-2 number, since 2×20189549548² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7669486 + ... + 7672117.

It is an arithmetic number, because the mean of its divisors is an integer number (1718259648).

Almost surely, 2^20189549548 is an apocalyptic number.

20189549548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20189549548 is an abundant number, since it is smaller than the sum of its proper divisors (21048682004).

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

20189549548 is a wasteful number, since it uses less digits than its factorization.

20189549548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15341661 (or 15341659 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 20189549548 in words is "twenty billion, one hundred eighty-nine million, five hundred forty-nine thousand, five hundred forty-eight".