20147555629 has 2 divisors, whose sum is σ = 20147555630. Its totient is φ = 20147555628.

The previous prime is 20147555621. The next prime is 20147555639. The reversal of 20147555629 is 92655574102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18217710729 + 1929844900 = 134973^2 + 43930^2 .

It is a cyclic number.

It is not a de Polignac number, because 20147555629 - 2³ = 20147555621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20147555621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073777814 + 10073777815.

It is an arithmetic number, because the mean of its divisors is an integer number (10073777815).

Almost surely, 2^20147555629 is an apocalyptic number.

It is an amenable number.

20147555629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20147555629 is an equidigital number, since it uses as much as digits as its factorization.

20147555629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 20147555629 in words is "twenty billion, one hundred forty-seven million, five hundred fifty-five thousand, six hundred twenty-nine".