20353014557 has 2 divisors, whose sum is σ = 20353014558. Its totient is φ = 20353014556.

The previous prime is 20353014553. The next prime is 20353014589. The reversal of 20353014557 is 75541035302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14802615556 + 5550399001 = 121666^2 + 74501^2 .

It is a cyclic number.

It is not a de Polignac number, because 20353014557 - 2² = 20353014553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353014553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176507278 + 10176507279.

It is an arithmetic number, because the mean of its divisors is an integer number (10176507279).

Almost surely, 2^20353014557 is an apocalyptic number.

It is an amenable number.

20353014557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353014557 is an equidigital number, since it uses as much as digits as its factorization.

20353014557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 35.

Adding to 20353014557 its reverse (75541035302), we get a palindrome (95894049859).

The spelling of 20353014557 in words is "twenty billion, three hundred fifty-three million, fourteen thousand, five hundred fifty-seven".