20198544 has 20 divisors (see below), whose sum is σ = 52179696. Its totient is φ = 6732832.

The previous prime is 20198543. The next prime is 20198569. The reversal of 20198544 is 44589102.

It is not an unprimeable number, because it can be changed into a prime (20198543) 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, 210354 + ... + 210449.

Almost surely, 2^20198544 is an apocalyptic number.

20198544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20198544 is an abundant number, since it is smaller than the sum of its proper divisors (31981152).

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

20198544 is a wasteful number, since it uses less digits than its factorization.

20198544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420814 (or 420808 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20198544 is about 4494.2790300559. The cubic root of 20198544 is about 272.3370245634.

The spelling of 20198544 in words is "twenty million, one hundred ninety-eight thousand, five hundred forty-four".