20700317 has 6 divisors (see below), whose sum is σ = 22753374. Its totient is φ = 18818360.

The previous prime is 20700313. The next prime is 20700319. The reversal of 20700317 is 71300702.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 755161 = 4466^2 + 869^2 .

It is not a de Polignac number, because 20700317 - 2² = 20700313 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 (20700313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85418 + ... + 85659.

It is an arithmetic number, because the mean of its divisors is an integer number (3792229).

Almost surely, 2^20700317 is an apocalyptic number.

It is an amenable number.

20700317 is a deficient number, since it is larger than the sum of its proper divisors (2053057).

20700317 is a wasteful number, since it uses less digits than its factorization.

20700317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171099 (or 171088 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 20700317 is about 4549.7601035659. The cubic root of 20700317 is about 274.5737396217.

The spelling of 20700317 in words is "twenty million, seven hundred thousand, three hundred seventeen".