20716351 has 2 divisors, whose sum is σ = 20716352. Its totient is φ = 20716350.

The previous prime is 20716349. The next prime is 20716369. The reversal of 20716351 is 15361702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20716351 - 2¹ = 20716349 is a prime.

Together with 20716349, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20716301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358175 + 10358176.

It is an arithmetic number, because the mean of its divisors is an integer number (10358176).

Almost surely, 2^20716351 is an apocalyptic number.

20716351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20716351 is an equidigital number, since it uses as much as digits as its factorization.

20716351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20716351 is about 4551.5218334091. The cubic root of 20716351 is about 274.6446142068.

The spelling of 20716351 in words is "twenty million, seven hundred sixteen thousand, three hundred fifty-one".