20747347 has 2 divisors, whose sum is σ = 20747348. Its totient is φ = 20747346.

The previous prime is 20747341. The next prime is 20747399. The reversal of 20747347 is 74374702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20747347 - 2¹⁹ = 20223059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20747341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10373673 + 10373674.

It is an arithmetic number, because the mean of its divisors is an integer number (10373674).

Almost surely, 2^20747347 is an apocalyptic number.

20747347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20747347 is an equidigital number, since it uses as much as digits as its factorization.

20747347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 20747347 is about 4554.9255756818. The cubic root of 20747347 is about 274.7815212374.

The spelling of 20747347 in words is "twenty million, seven hundred forty-seven thousand, three hundred forty-seven".