20138319 has 24 divisors (see below), whose sum is σ = 31526352. Its totient is φ = 12337920.

The previous prime is 20138311. The next prime is 20138329. The reversal of 20138319 is 91383102.

It is not a de Polignac number, because 20138319 - 2³ = 20138311 is a prime.

It is a super-2 number, since 2×20138319² = 811103784291522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20138292 and 20138301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20138311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5049 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (1313598).

Almost surely, 2^20138319 is an apocalyptic number.

20138319 is a deficient number, since it is larger than the sum of its proper divisors (11388033).

20138319 is a wasteful number, since it uses less digits than its factorization.

20138319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127 (or 3124 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20138319 is about 4487.5738434036. The cubic root of 20138319 is about 272.0660838207.

The spelling of 20138319 in words is "twenty million, one hundred thirty-eight thousand, three hundred nineteen".