20006288 has 20 divisors (see below), whose sum is σ = 40099740. Its totient is φ = 9657984.

The previous prime is 20006279. The next prime is 20006339. The reversal of 20006288 is 88260002.

It can be written as a sum of positive squares in 2 ways, for example, as 9560464 + 10445824 = 3092^2 + 3232^2 .

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, 21095 + ... + 22022.

It is an arithmetic number, because the mean of its divisors is an integer number (2004987).

Almost surely, 2^20006288 is an apocalyptic number.

It is an amenable number.

20006288 is an abundant number, since it is smaller than the sum of its proper divisors (20093452).

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

20006288 is a wasteful number, since it uses less digits than its factorization.

20006288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43154 (or 43148 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20006288 is about 4472.8389195230. The cubic root of 20006288 is about 271.4702057754.

The spelling of 20006288 in words is "twenty million, six thousand, two hundred eighty-eight".