20389060 has 12 divisors (see below), whose sum is σ = 42817068. Its totient is φ = 8155616.

The previous prime is 20389049. The next prime is 20389073. The reversal of 20389060 is 6098302.

It can be written as a sum of positive squares in 2 ways, for example, as 2883204 + 17505856 = 1698^2 + 4184^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509707 + ... + 509746.

It is an arithmetic number, because the mean of its divisors is an integer number (3568089).

Almost surely, 2^20389060 is an apocalyptic number.

20389060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20389060 is an abundant number, since it is smaller than the sum of its proper divisors (22428008).

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

20389060 is a wasteful number, since it uses less digits than its factorization.

20389060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019462 (or 1019460 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20389060 is about 4515.4246754873. The cubic root of 20389060 is about 273.1905890931.

The spelling of 20389060 in words is "twenty million, three hundred eighty-nine thousand, sixty".