20738471417 has 2 divisors, whose sum is σ = 20738471418. Its totient is φ = 20738471416.

The previous prime is 20738471371. The next prime is 20738471441. The reversal of 20738471417 is 71417483702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15258178576 + 5480292841 = 123524^2 + 74029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20738471417 is a prime.

It is not a weakly prime, because it can be changed into another prime (20738471447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369235708 + 10369235709.

It is an arithmetic number, because the mean of its divisors is an integer number (10369235709).

Almost surely, 2^20738471417 is an apocalyptic number.

It is an amenable number.

20738471417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20738471417 is an equidigital number, since it uses as much as digits as its factorization.

20738471417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 20738471417 in words is "twenty billion, seven hundred thirty-eight million, four hundred seventy-one thousand, four hundred seventeen".