20118319 has 4 divisors (see below), whose sum is σ = 21665896. Its totient is φ = 18570744.

The previous prime is 20118311. The next prime is 20118341. The reversal of 20118319 is 91381102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20118319 - 2³ = 20118311 is a prime.

It is a super-2 number, since 2×20118319² = 809493518771522, 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 = 20118293 and 20118302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20118311) 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, 773769 + ... + 773794.

It is an arithmetic number, because the mean of its divisors is an integer number (5416474).

Almost surely, 2^20118319 is an apocalyptic number.

20118319 is a deficient number, since it is larger than the sum of its proper divisors (1547577).

20118319 is a wasteful number, since it uses less digits than its factorization.

20118319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547576.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 20118319 is about 4485.3449142736. The cubic root of 20118319 is about 271.9759881845.

The spelling of 20118319 in words is "twenty million, one hundred eighteen thousand, three hundred nineteen".