20589906 has 16 divisors (see below), whose sum is σ = 41580864. Its totient is φ = 6796464.

The previous prime is 20589857. The next prime is 20589911. The reversal of 20589906 is 60998502.

It is a happy 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, 16041 + ... + 17276.

It is an arithmetic number, because the mean of its divisors is an integer number (2598804).

Almost surely, 2^20589906 is an apocalyptic number.

20589906 is an abundant number, since it is smaller than the sum of its proper divisors (20990958).

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

20589906 is a wasteful number, since it uses less digits than its factorization.

20589906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33425.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 20589906 is about 4537.6101639519. The cubic root of 20589906 is about 274.0846968527.

The spelling of 20589906 in words is "twenty million, five hundred eighty-nine thousand, nine hundred six".