20368817 has 16 divisors (see below), whose sum is σ = 25353600. Its totient is φ = 15966720.

The previous prime is 20368811. The next prime is 20368819. The reversal of 20368817 is 71886302.

It is not a de Polignac number, because 20368817 - 2¹⁴ = 20352433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20368811) 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, 1217 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (1584600).

Almost surely, 2^20368817 is an apocalyptic number.

It is an amenable number.

20368817 is a deficient number, since it is larger than the sum of its proper divisors (4984783).

20368817 is a wasteful number, since it uses less digits than its factorization.

20368817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20368817 is about 4513.1825799540. The cubic root of 20368817 is about 273.1001479726.

The spelling of 20368817 in words is "twenty million, three hundred sixty-eight thousand, eight hundred seventeen".