20093909 has 8 divisors (see below), whose sum is σ = 21977760. Its totient is φ = 18219600.

The previous prime is 20093891. The next prime is 20093911. The reversal of 20093909 is 90939002.

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

It is a cyclic number.

It is not a de Polignac number, because 20093909 - 2¹² = 20089813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20093929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2462 + ... + 6800.

It is an arithmetic number, because the mean of its divisors is an integer number (2747220).

Almost surely, 2^20093909 is an apocalyptic number.

It is an amenable number.

20093909 is a deficient number, since it is larger than the sum of its proper divisors (1883851).

20093909 is a wasteful number, since it uses less digits than its factorization.

20093909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 20093909 is about 4482.6230044473. The cubic root of 20093909 is about 271.8659455125.

The spelling of 20093909 in words is "twenty million, ninety-three thousand, nine hundred nine".