20006259 has 72 divisors (see below), whose sum is σ = 36484560. Its totient is φ = 9652608.

The previous prime is 20006243. The next prime is 20006279. The reversal of 20006259 is 95260002.

It is not a de Polignac number, because 20006259 - 2⁴ = 20006243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006209) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 689857 + ... + 689885.

It is an arithmetic number, because the mean of its divisors is an integer number (506730).

Almost surely, 2^20006259 is an apocalyptic number.

20006259 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20006259 is a deficient number, since it is larger than the sum of its proper divisors (16478301).

20006259 is a wasteful number, since it uses less digits than its factorization.

20006259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20006259 is about 4472.8356777329. The cubic root of 20006259 is about 271.4700746060.

The spelling of 20006259 in words is "twenty million, six thousand, two hundred fifty-nine".