20354123301403 has 2 divisors, whose sum is σ = 20354123301404. Its totient is φ = 20354123301402.

The previous prime is 20354123301397. The next prime is 20354123301439. The reversal of 20354123301403 is 30410332145302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20354123301403 - 2⁵ = 20354123301371 is a prime.

It is a super-3 number, since 3×20354123301403³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20354123301103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177061650701 + 10177061650702.

It is an arithmetic number, because the mean of its divisors is an integer number (10177061650702).

Almost surely, 2^{20354123301403} is an apocalyptic number.

20354123301403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354123301403 is an equidigital number, since it uses as much as digits as its factorization.

20354123301403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 20354123301403 its reverse (30410332145302), we get a palindrome (50764455446705).

The spelling of 20354123301403 in words is "twenty trillion, three hundred fifty-four billion, one hundred twenty-three million, three hundred one thousand, four hundred three".