20489319 has 6 divisors (see below), whose sum is σ = 29595696. Its totient is φ = 13659540.

The previous prime is 20489311. The next prime is 20489327. The reversal of 20489319 is 91398402.

It is an interprime number because it is at equal distance from previous prime (20489311) and next prime (20489327).

It is not a de Polignac number, because 20489319 - 2³ = 20489311 is a prime.

It is a super-2 number, since 2×20489319² = 839624386167522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1138287 + ... + 1138304.

It is an arithmetic number, because the mean of its divisors is an integer number (4932616).

Almost surely, 2^20489319 is an apocalyptic number.

20489319 is a deficient number, since it is larger than the sum of its proper divisors (9106377).

20489319 is a wasteful number, since it uses less digits than its factorization.

20489319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276597 (or 2276594 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20489319 is about 4526.5128962591. The cubic root of 20489319 is about 273.6376432637.

The spelling of 20489319 in words is "twenty million, four hundred eighty-nine thousand, three hundred nineteen".