20099285 has 8 divisors (see below), whose sum is σ = 24264576. Its totient is φ = 15982480.

The previous prime is 20099269. The next prime is 20099311. The reversal of 20099285 is 58299002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20099285 - 2⁴ = 20099269 is a prime.

It is a super-2 number, since 2×20099285² = 807962515022450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 11201 + ... + 12870.

It is an arithmetic number, because the mean of its divisors is an integer number (3033072).

Almost surely, 2^20099285 is an apocalyptic number.

It is an amenable number.

20099285 is a deficient number, since it is larger than the sum of its proper divisors (4165291).

20099285 is a wasteful number, since it uses less digits than its factorization.

20099285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24243.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20099285 is about 4483.2226132549. Note that the first 3 decimals coincide. The cubic root of 20099285 is about 271.8901886965.

The spelling of 20099285 in words is "twenty million, ninety-nine thousand, two hundred eighty-five".