20330487473 has 2 divisors, whose sum is σ = 20330487474. Its totient is φ = 20330487472.

The previous prime is 20330487469. The next prime is 20330487577. The reversal of 20330487473 is 37478403302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13199022769 + 7131464704 = 114887^2 + 84448^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330487473 - 2² = 20330487469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20330487473.

It is not a weakly prime, because it can be changed into another prime (20330487433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165243736 + 10165243737.

It is an arithmetic number, because the mean of its divisors is an integer number (10165243737).

Almost surely, 2^20330487473 is an apocalyptic number.

It is an amenable number.

20330487473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330487473 is an equidigital number, since it uses as much as digits as its factorization.

20330487473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 20330487473 in words is "twenty billion, three hundred thirty million, four hundred eighty-seven thousand, four hundred seventy-three".