20477091653 has 2 divisors, whose sum is σ = 20477091654. Its totient is φ = 20477091652.

The previous prime is 20477091641. The next prime is 20477091683. The reversal of 20477091653 is 35619077402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13743576289 + 6733515364 = 117233^2 + 82058^2 .

It is a cyclic number.

It is not a de Polignac number, because 20477091653 - 2¹⁰ = 20477090629 is a prime.

It is a super-2 number, since 2×20477091653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20477091683) 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, 10238545826 + 10238545827.

It is an arithmetic number, because the mean of its divisors is an integer number (10238545827).

Almost surely, 2^20477091653 is an apocalyptic number.

It is an amenable number.

20477091653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20477091653 is an equidigital number, since it uses as much as digits as its factorization.

20477091653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 20477091653 in words is "twenty billion, four hundred seventy-seven million, ninety-one thousand, six hundred fifty-three".