20883617 has 2 divisors, whose sum is σ = 20883618. Its totient is φ = 20883616.

The previous prime is 20883539. The next prime is 20883619. The reversal of 20883617 is 71638802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 9296401 = 3404^2 + 3049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20883617 is a prime.

It is a super-2 number, since 2×20883617² = 872250918005378, which contains 22 as substring.

Together with 20883619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20883619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10441808 + 10441809.

It is an arithmetic number, because the mean of its divisors is an integer number (10441809).

Almost surely, 2^20883617 is an apocalyptic number.

It is an amenable number.

20883617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20883617 is an equidigital number, since it uses as much as digits as its factorization.

20883617 is an evil number, because the sum of its binary digits is even.

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

The square root of 20883617 is about 4569.8596258529. The cubic root of 20883617 is about 275.3818035519.

The spelling of 20883617 in words is "twenty million, eight hundred eighty-three thousand, six hundred seventeen".