20135420299 has 4 divisors (see below), whose sum is σ = 20419017840. Its totient is φ = 19851822760.

The previous prime is 20135420257. The next prime is 20135420363. The reversal of 20135420299 is 99202453102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99202453102 = 2 ⋅49601226551.

It is a cyclic number.

It is not a de Polignac number, because 20135420299 - 2¹⁷ = 20135289227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135420699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141798664 + ... + 141798805.

It is an arithmetic number, because the mean of its divisors is an integer number (5104754460).

Almost surely, 2^20135420299 is an apocalyptic number.

20135420299 is a deficient number, since it is larger than the sum of its proper divisors (283597541).

20135420299 is an equidigital number, since it uses as much as digits as its factorization.

20135420299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283597540.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 20135420299 in words is "twenty billion, one hundred thirty-five million, four hundred twenty thousand, two hundred ninety-nine".