20487319 has 8 divisors (see below), whose sum is σ = 21473280. Its totient is φ = 19509336.

The previous prime is 20487317. The next prime is 20487343. The reversal of 20487319 is 91378402.

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

It is not a de Polignac number, because 20487319 - 2¹ = 20487317 is a prime.

It is a super-2 number, since 2×20487319² = 839460479615522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487317) 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 7 ways as a sum of consecutive naturals, for example, 3634 + ... + 7360.

It is an arithmetic number, because the mean of its divisors is an integer number (2684160).

Almost surely, 2^20487319 is an apocalyptic number.

20487319 is a deficient number, since it is larger than the sum of its proper divisors (985961).

20487319 is a wasteful number, since it uses less digits than its factorization.

20487319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20487319 is about 4526.2919702556. The cubic root of 20487319 is about 273.6287395500.

The spelling of 20487319 in words is "twenty million, four hundred eighty-seven thousand, three hundred nineteen".