20016393473 has 2 divisors, whose sum is σ = 20016393474. Its totient is φ = 20016393472.

The previous prime is 20016393443. The next prime is 20016393497. The reversal of 20016393473 is 37439361002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19885794289 + 130599184 = 141017^2 + 11428^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016393473 - 2⁶ = 20016393409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20016393443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008196736 + 10008196737.

It is an arithmetic number, because the mean of its divisors is an integer number (10008196737).

Almost surely, 2^20016393473 is an apocalyptic number.

It is an amenable number.

20016393473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016393473 is an equidigital number, since it uses as much as digits as its factorization.

20016393473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 38.

The spelling of 20016393473 in words is "twenty billion, sixteen million, three hundred ninety-three thousand, four hundred seventy-three".