20403320435 has 16 divisors (see below), whose sum is σ = 24791254176. Its totient is φ = 16119088128.

The previous prime is 20403320419. The next prime is 20403320459. The reversal of 20403320435 is 53402330402.

It is a cyclic number.

It is not a de Polignac number, because 20403320435 - 2⁴ = 20403320419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48227 + ... + 207683.

It is an arithmetic number, because the mean of its divisors is an integer number (1549453386).

Almost surely, 2^20403320435 is an apocalyptic number.

20403320435 is a deficient number, since it is larger than the sum of its proper divisors (4387933741).

20403320435 is a wasteful number, since it uses less digits than its factorization.

20403320435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159782.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 20403320435 its reverse (53402330402), we get a palindrome (73805650837).

The spelling of 20403320435 in words is "twenty billion, four hundred three million, three hundred twenty thousand, four hundred thirty-five".