20893305 has 16 divisors (see below), whose sum is σ = 33493824. Its totient is φ = 11121600.

The previous prime is 20893297. The next prime is 20893309. The reversal of 20893305 is 50339802.

It is a happy number.

It is not a de Polignac number, because 20893305 - 2³ = 20893297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20893309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (2093364).

Almost surely, 2^20893305 is an apocalyptic number.

It is an amenable number.

20893305 is a deficient number, since it is larger than the sum of its proper divisors (12600519).

20893305 is a wasteful number, since it uses less digits than its factorization.

20893305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20893305 is about 4570.9194917434. The cubic root of 20893305 is about 275.4243805708.

The spelling of 20893305 in words is "twenty million, eight hundred ninety-three thousand, three hundred five".