20315620019 has 4 divisors (see below), whose sum is σ = 20391143040. Its totient is φ = 20240097000.

The previous prime is 20315619967. The next prime is 20315620051. The reversal of 20315620019 is 91002651302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91002651302 = 2 ⋅45501325651.

It is a cyclic number.

It is not a de Polignac number, because 20315620019 - 2²⁰ = 20314571443 is a prime.

It is a super-3 number, since 3×20315620019³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315619973 and 20315620000.

It is not an unprimeable number, because it can be changed into a prime (20315620069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37761107 + ... + 37761644.

It is an arithmetic number, because the mean of its divisors is an integer number (5097785760).

Almost surely, 2^20315620019 is an apocalyptic number.

20315620019 is a deficient number, since it is larger than the sum of its proper divisors (75523021).

20315620019 is an equidigital number, since it uses as much as digits as its factorization.

20315620019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75523020.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 20315620019 in words is "twenty billion, three hundred fifteen million, six hundred twenty thousand, nineteen".