20318519 has 8 divisors (see below), whose sum is σ = 23168880. Its totient is φ = 17652096.

The previous prime is 20318477. The next prime is 20318521. The reversal of 20318519 is 91581302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20318519 - 2¹⁶ = 20252983 is a prime.

It is a super-2 number, since 2×20318519² = 825684428706722, 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 = 20318491 and 20318500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20318539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45749 + ... + 46190.

It is an arithmetic number, because the mean of its divisors is an integer number (2896110).

Almost surely, 2^20318519 is an apocalyptic number.

20318519 is a deficient number, since it is larger than the sum of its proper divisors (2850361).

20318519 is a wasteful number, since it uses less digits than its factorization.

20318519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91969.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 20318519 is about 4507.6067929668. The cubic root of 20318519 is about 272.8751682320.

The spelling of 20318519 in words is "twenty million, three hundred eighteen thousand, five hundred nineteen".