20711497 has 2 divisors, whose sum is σ = 20711498. Its totient is φ = 20711496.

The previous prime is 20711473. The next prime is 20711521. The reversal of 20711497 is 79411702.

It is a balanced prime because it is at equal distance from previous prime (20711473) and next prime (20711521).

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 962361 = 4444^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 20711497 - 2²³ = 12322889 is a prime.

It is a super-2 number, since 2×20711497² = 857932215962018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20711407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10355748 + 10355749.

It is an arithmetic number, because the mean of its divisors is an integer number (10355749).

Almost surely, 2^20711497 is an apocalyptic number.

It is an amenable number.

20711497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20711497 is an equidigital number, since it uses as much as digits as its factorization.

20711497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 20711497 is about 4550.9885739254. The cubic root of 20711497 is about 274.6231620844.

The spelling of 20711497 in words is "twenty million, seven hundred eleven thousand, four hundred ninety-seven".