20750647 has 2 divisors, whose sum is σ = 20750648. Its totient is φ = 20750646.

The previous prime is 20750627. The next prime is 20750671. The reversal of 20750647 is 74605702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20750647 - 2¹⁹ = 20226359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20750627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375323 + 10375324.

It is an arithmetic number, because the mean of its divisors is an integer number (10375324).

Almost surely, 2^20750647 is an apocalyptic number.

20750647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20750647 is an equidigital number, since it uses as much as digits as its factorization.

20750647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20750647 is about 4555.2878064948. The cubic root of 20750647 is about 274.7960890589.

The spelling of 20750647 in words is "twenty million, seven hundred fifty thousand, six hundred forty-seven".