20770043389 has 2 divisors, whose sum is σ = 20770043390. Its totient is φ = 20770043388.

The previous prime is 20770043317. The next prime is 20770043417. The reversal of 20770043389 is 98334007702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18784895364 + 1985148025 = 137058^2 + 44555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20770043389 - 2⁹ = 20770042877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20770046389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10385021694 + 10385021695.

It is an arithmetic number, because the mean of its divisors is an integer number (10385021695).

Almost surely, 2^20770043389 is an apocalyptic number.

It is an amenable number.

20770043389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20770043389 is an equidigital number, since it uses as much as digits as its factorization.

20770043389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 20770043389 in words is "twenty billion, seven hundred seventy million, forty-three thousand, three hundred eighty-nine".