20392319 has 4 divisors (see below), whose sum is σ = 20572896. Its totient is φ = 20211744.

The previous prime is 20392297. The next prime is 20392343. The reversal of 20392319 is 91329302.

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 20392319 - 2⁸ = 20392063 is a prime.

It is a super-2 number, since 2×20392319² = 831693348395522, 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 = 20392291 and 20392300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302319) 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, 90119 + ... + 90344.

It is an arithmetic number, because the mean of its divisors is an integer number (5143224).

Almost surely, 2^20392319 is an apocalyptic number.

20392319 is a deficient number, since it is larger than the sum of its proper divisors (180577).

20392319 is a wasteful number, since it uses less digits than its factorization.

20392319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180576.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20392319 is about 4515.7855352087. The cubic root of 20392319 is about 273.2051439687.

The spelling of 20392319 in words is "twenty million, three hundred ninety-two thousand, three hundred nineteen".