20099586 has 16 divisors (see below), whose sum is σ = 43291584. Its totient is φ = 6184464.

The previous prime is 20099567. The next prime is 20099617. The reversal of 20099586 is 68599002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 128766 + ... + 128921.

It is an arithmetic number, because the mean of its divisors is an integer number (2705724).

Almost surely, 2^20099586 is an apocalyptic number.

20099586 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20099586 is an abundant number, since it is smaller than the sum of its proper divisors (23191998).

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

20099586 is a wasteful number, since it uses less digits than its factorization.

20099586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257705.

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

The square root of 20099586 is about 4483.2561827315. The cubic root of 20099586 is about 271.8915459345.

The spelling of 20099586 in words is "twenty million, ninety-nine thousand, five hundred eighty-six".