20678383321 has 2 divisors, whose sum is σ = 20678383322. Its totient is φ = 20678383320.

The previous prime is 20678383277. The next prime is 20678383337. The reversal of 20678383321 is 12338387602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19126890000 + 1551493321 = 138300^2 + 39389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20678383321 is a prime.

It is not a weakly prime, because it can be changed into another prime (20678383421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10339191660 + 10339191661.

It is an arithmetic number, because the mean of its divisors is an integer number (10339191661).

Almost surely, 2^20678383321 is an apocalyptic number.

It is an amenable number.

20678383321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20678383321 is an equidigital number, since it uses as much as digits as its factorization.

20678383321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20678383321 in words is "twenty billion, six hundred seventy-eight million, three hundred eighty-three thousand, three hundred twenty-one".