20653570087 has 2 divisors, whose sum is σ = 20653570088. Its totient is φ = 20653570086.

The previous prime is 20653570073. The next prime is 20653570103. The reversal of 20653570087 is 78007535602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20653570087 - 2³¹ = 18506086439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20653570037) 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, 10326785043 + 10326785044.

It is an arithmetic number, because the mean of its divisors is an integer number (10326785044).

Almost surely, 2^20653570087 is an apocalyptic number.

20653570087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20653570087 is an equidigital number, since it uses as much as digits as its factorization.

20653570087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 20653570087 in words is "twenty billion, six hundred fifty-three million, five hundred seventy thousand, eighty-seven".