20354257001761 has 2 divisors, whose sum is σ = 20354257001762. Its totient is φ = 20354257001760.

The previous prime is 20354257001711. The next prime is 20354257001777. The reversal of 20354257001761 is 16710075245302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19754958069025 + 599298932736 = 4444655^2 + 774144^2 .

It is a cyclic number.

It is not a de Polignac number, because 20354257001761 - 2¹³ = 20354256993569 is a prime.

It is a super-2 number, since 2×20354257001761² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20354257001711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177128500880 + 10177128500881.

It is an arithmetic number, because the mean of its divisors is an integer number (10177128500881).

Almost surely, 2^{20354257001761} is an apocalyptic number.

It is an amenable number.

20354257001761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354257001761 is an equidigital number, since it uses as much as digits as its factorization.

20354257001761 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 20354257001761 in words is "twenty trillion, three hundred fifty-four billion, two hundred fifty-seven million, one thousand, seven hundred sixty-one".