20701467557 has 2 divisors, whose sum is σ = 20701467558. Its totient is φ = 20701467556.

The previous prime is 20701467433. The next prime is 20701467599. The reversal of 20701467557 is 75576410702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16737631876 + 3963835681 = 129374^2 + 62959^2 .

It is a cyclic number.

It is not a de Polignac number, because 20701467557 - 2⁸ = 20701467301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20701667557) 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, 10350733778 + 10350733779.

It is an arithmetic number, because the mean of its divisors is an integer number (10350733779).

Almost surely, 2^20701467557 is an apocalyptic number.

It is an amenable number.

20701467557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20701467557 is an equidigital number, since it uses as much as digits as its factorization.

20701467557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 411600, while the sum is 44.

The spelling of 20701467557 in words is "twenty billion, seven hundred one million, four hundred sixty-seven thousand, five hundred fifty-seven".