20635164361403 has 2 divisors, whose sum is σ = 20635164361404. Its totient is φ = 20635164361402.

The previous prime is 20635164361397. The next prime is 20635164361459. The reversal of 20635164361403 is 30416346153602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20635164361403 - 2¹⁸ = 20635164099259 is a prime.

It is a super-2 number, since 2×20635164361403² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20635164361103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10317582180701 + 10317582180702.

It is an arithmetic number, because the mean of its divisors is an integer number (10317582180702).

Almost surely, 2^{20635164361403} is an apocalyptic number.

20635164361403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20635164361403 is an equidigital number, since it uses as much as digits as its factorization.

20635164361403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 20635164361403 in words is "twenty trillion, six hundred thirty-five billion, one hundred sixty-four million, three hundred sixty-one thousand, four hundred three".