20202321019 has 4 divisors (see below), whose sum is σ = 20429313480. Its totient is φ = 19975328560.

The previous prime is 20202320981. The next prime is 20202321023. The reversal of 20202321019 is 91012320202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91012320202 = 2 ⋅45506160101.

It is a cyclic number.

It is not a de Polignac number, because 20202321019 - 2⁷ = 20202320891 is a prime.

It is a super-2 number, since 2×20202321019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202321079) 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 3 ways as a sum of consecutive naturals, for example, 113496097 + ... + 113496274.

It is an arithmetic number, because the mean of its divisors is an integer number (5107328370).

Almost surely, 2^20202321019 is an apocalyptic number.

20202321019 is a deficient number, since it is larger than the sum of its proper divisors (226992461).

20202321019 is an equidigital number, since it uses as much as digits as its factorization.

20202321019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226992460.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 20202321019 in words is "twenty billion, two hundred two million, three hundred twenty-one thousand, nineteen".