20013663154603 has 2 divisors, whose sum is σ = 20013663154604. Its totient is φ = 20013663154602.

The previous prime is 20013663154493. The next prime is 20013663154627. The reversal of 20013663154603 is 30645136631002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20013663154603 - 2²⁹ = 20013126283691 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013663554603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006831577301 + 10006831577302.

It is an arithmetic number, because the mean of its divisors is an integer number (10006831577302).

Almost surely, 2^{20013663154603} is an apocalyptic number.

20013663154603 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013663154603 is an equidigital number, since it uses as much as digits as its factorization.

20013663154603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 20013663154603 its reverse (30645136631002), we get a palindrome (50658799785605).

The spelling of 20013663154603 in words is "twenty trillion, thirteen billion, six hundred sixty-three million, one hundred fifty-four thousand, six hundred three".