20653570073 has 2 divisors, whose sum is σ = 20653570074. Its totient is φ = 20653570072.

The previous prime is 20653570037. The next prime is 20653570087. The reversal of 20653570073 is 37007535602.

Together with previous prime (20653570037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19682125849 + 971444224 = 140293^2 + 31168^2 .

It is a cyclic number.

It is not a de Polignac number, because 20653570073 - 2⁶ = 20653570009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20653579073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10326785036 + 10326785037.

It is an arithmetic number, because the mean of its divisors is an integer number (10326785037).

Almost surely, 2^20653570073 is an apocalyptic number.

It is an amenable number.

20653570073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20653570073 is an equidigital number, since it uses as much as digits as its factorization.

20653570073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 38.

The spelling of 20653570073 in words is "twenty billion, six hundred fifty-three million, five hundred seventy thousand, seventy-three".