20793817 has 8 divisors (see below), whose sum is σ = 23670720. Its totient is φ = 18081360.

The previous prime is 20793803. The next prime is 20793833. The reversal of 20793817 is 71839702.

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

It is not a de Polignac number, because 20793817 - 2²³ = 12405209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20790817) 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, 40842 + ... + 41347.

It is an arithmetic number, because the mean of its divisors is an integer number (2958840).

Almost surely, 2^20793817 is an apocalyptic number.

It is an amenable number.

20793817 is a deficient number, since it is larger than the sum of its proper divisors (2876903).

20793817 is a wasteful number, since it uses less digits than its factorization.

20793817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82223.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 20793817 is about 4560.0237937976. The cubic root of 20793817 is about 274.9865205514.

The spelling of 20793817 in words is "twenty million, seven hundred ninety-three thousand, eight hundred seventeen".