20730071629 has 2 divisors, whose sum is σ = 20730071630. Its totient is φ = 20730071628.

The previous prime is 20730071573. The next prime is 20730071639. The reversal of 20730071629 is 92617003702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11284175529 + 9445896100 = 106227^2 + 97190^2 .

It is a cyclic number.

It is not a de Polignac number, because 20730071629 - 2⁷ = 20730071501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20730071639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365035814 + 10365035815.

It is an arithmetic number, because the mean of its divisors is an integer number (10365035815).

Almost surely, 2^20730071629 is an apocalyptic number.

It is an amenable number.

20730071629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20730071629 is an equidigital number, since it uses as much as digits as its factorization.

20730071629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 20730071629 in words is "twenty billion, seven hundred thirty million, seventy-one thousand, six hundred twenty-nine".