20189455584 has 48 divisors (see below), whose sum is σ = 53026727040. Its totient is φ = 6726084480.

The previous prime is 20189455571. The next prime is 20189455603. The reversal of 20189455584 is 48555498102.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×20189455584² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118347 + ... + 233205.

It is an arithmetic number, because the mean of its divisors is an integer number (1104723480).

Almost surely, 2^20189455584 is an apocalyptic number.

20189455584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20189455584 is an abundant number, since it is smaller than the sum of its proper divisors (32837271456).

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

20189455584 is a wasteful number, since it uses less digits than its factorization.

20189455584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116703 (or 116695 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 51.

The spelling of 20189455584 in words is "twenty billion, one hundred eighty-nine million, four hundred fifty-five thousand, five hundred eighty-four".