20116917 has 10 divisors (see below), whose sum is σ = 30051318. Its totient is φ = 13411224.

The previous prime is 20116913. The next prime is 20116919. The reversal of 20116917 is 71961102.

It can be written as a sum of positive squares in only one way, i.e., 13351716 + 6765201 = 3654^2 + 2601^2 .

It is not a de Polignac number, because 20116917 - 2² = 20116913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116913) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124098 + ... + 124259.

Almost surely, 2^20116917 is an apocalyptic number.

20116917 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20116917 is a deficient number, since it is larger than the sum of its proper divisors (9934401).

20116917 is an equidigital number, since it uses as much as digits as its factorization.

20116917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248369 (or 248360 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 20116917 is about 4485.1886247961. The cubic root of 20116917 is about 271.9696702413.

The spelling of 20116917 in words is "twenty million, one hundred sixteen thousand, nine hundred seventeen".