20009319 has 32 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 11595360.

The previous prime is 20009293. The next prime is 20009329. The reversal of 20009319 is 91390002.

20009319 = 162² + 163² + ... + 400².

It is a happy number.

It is not a de Polignac number, because 20009319 - 2¹⁷ = 19878247 is a prime.

It is a super-2 number, since 2×20009319² = 800745693687522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83602 + ... + 83840.

It is an arithmetic number, because the mean of its divisors is an integer number (950400).

Almost surely, 2^20009319 is an apocalyptic number.

20009319 is a deficient number, since it is larger than the sum of its proper divisors (10403481).

20009319 is a wasteful number, since it uses less digits than its factorization.

20009319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 20009319 is about 4473.1777295341. The cubic root of 20009319 is about 271.4839145427.

The spelling of 20009319 in words is "twenty million, nine thousand, three hundred nineteen".