20113353491 has 16 divisors (see below), whose sum is σ = 25108327680. Its totient is φ = 15652781280.

The previous prime is 20113353479. The next prime is 20113353493. The reversal of 20113353491 is 19435331102.

It is a cyclic number.

It is not a de Polignac number, because 20113353491 - 2¹⁴ = 20113337107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113353493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105356 + ... + 226553.

It is an arithmetic number, because the mean of its divisors is an integer number (1569270480).

Almost surely, 2^20113353491 is an apocalyptic number.

20113353491 is a deficient number, since it is larger than the sum of its proper divisors (4994974189).

20113353491 is a wasteful number, since it uses less digits than its factorization.

20113353491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332714.

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 20113353491 its reverse (19435331102), we get a palindrome (39548684593).

The spelling of 20113353491 in words is "twenty billion, one hundred thirteen million, three hundred fifty-three thousand, four hundred ninety-one".