20289117120 has 56 divisors (see below), whose sum is σ = 64417949904. Its totient is φ = 5410430976.

The previous prime is 20289117091. The next prime is 20289117127. The reversal of 20289117120 is 2171198202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20289117127) 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 7 ways as a sum of consecutive naturals, for example, 10566289 + ... + 10568208.

It is an arithmetic number, because the mean of its divisors is an integer number (1150320534).

Almost surely, 2^20289117120 is an apocalyptic number.

20289117120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20289117120 is an abundant number, since it is smaller than the sum of its proper divisors (44128832784).

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

20289117120 is a wasteful number, since it uses less digits than its factorization.

20289117120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21134517 (or 21134507 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 20289117120 in words is "twenty billion, two hundred eighty-nine million, one hundred seventeen thousand, one hundred twenty".