20313019 has 4 divisors (see below), whose sum is σ = 20514240. Its totient is φ = 20111800.

The previous prime is 20313001. The next prime is 20313047. The reversal of 20313019 is 91031302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91031302 = 2 ⋅45515651.

It is a cyclic number.

It is not a de Polignac number, because 20313019 - 2¹³ = 20304827 is a prime.

It is a super-2 number, since 2×20313019² = 825237481788722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312987 and 20313005.

It is not an unprimeable number, because it can be changed into a prime (20313089) 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, 100459 + ... + 100660.

It is an arithmetic number, because the mean of its divisors is an integer number (5128560).

Almost surely, 2^20313019 is an apocalyptic number.

20313019 is a deficient number, since it is larger than the sum of its proper divisors (201221).

20313019 is a wasteful number, since it uses less digits than its factorization.

20313019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201220.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20313019 is about 4506.9966718426. The cubic root of 20313019 is about 272.8505445728.

It can be divided in two parts, 2031 and 3019, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 20313019 in words is "twenty million, three hundred thirteen thousand, nineteen".