20355420335 has 4 divisors (see below), whose sum is σ = 24426504408. Its totient is φ = 16284336264.

The previous prime is 20355420329. The next prime is 20355420361. The reversal of 20355420335 is 53302455302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20355420335 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035542029 + ... + 2035542038.

It is an arithmetic number, because the mean of its divisors is an integer number (6106626102).

Almost surely, 2^20355420335 is an apocalyptic number.

20355420335 is a deficient number, since it is larger than the sum of its proper divisors (4071084073).

20355420335 is an equidigital number, since it uses as much as digits as its factorization.

20355420335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071084072.

The product of its (nonzero) digits is 54000, while the sum is 32.

Adding to 20355420335 its reverse (53302455302), we get a palindrome (73657875637).

The spelling of 20355420335 in words is "twenty billion, three hundred fifty-five million, four hundred twenty thousand, three hundred thirty-five".