20021300099 has 4 divisors (see below), whose sum is σ = 20025622464. Its totient is φ = 20016977736.

The previous prime is 20021300083. The next prime is 20021300119. The reversal of 20021300099 is 99000312002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99000312002 = 2 ⋅49500156001.

It is a cyclic number.

It is not a de Polignac number, because 20021300099 - 2⁴ = 20021300083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021390099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154227 + ... + 2163500.

It is an arithmetic number, because the mean of its divisors is an integer number (5006405616).

Almost surely, 2^20021300099 is an apocalyptic number.

20021300099 is a deficient number, since it is larger than the sum of its proper divisors (4322365).

20021300099 is an equidigital number, since it uses as much as digits as its factorization.

20021300099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322364.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 20021300099 in words is "twenty billion, twenty-one million, three hundred thousand, ninety-nine".