20403021113 has 2 divisors, whose sum is σ = 20403021114. Its totient is φ = 20403021112.

The previous prime is 20403021097. The next prime is 20403021127. The reversal of 20403021113 is 31112030402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10216559929 + 10186461184 = 101077^2 + 100928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20403021113 - 2⁴ = 20403021097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20403021091 and 20403021100.

It is not a weakly prime, because it can be changed into another prime (20403021173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201510556 + 10201510557.

It is an arithmetic number, because the mean of its divisors is an integer number (10201510557).

Almost surely, 2^20403021113 is an apocalyptic number.

It is an amenable number.

20403021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20403021113 is an equidigital number, since it uses as much as digits as its factorization.

20403021113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20403021113 its reverse (31112030402), we get a palindrome (51515051515).

The spelling of 20403021113 in words is "twenty billion, four hundred three million, twenty-one thousand, one hundred thirteen".