20430617 has 8 divisors (see below), whose sum is σ = 21805056. Its totient is φ = 19075392.

The previous prime is 20430607. The next prime is 20430649. The reversal of 20430617 is 71603402.

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

It is a cyclic number.

It is not a de Polignac number, because 20430617 - 2¹⁰ = 20429593 is a prime.

It is a super-2 number, since 2×20430617² = 834820222001378, 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 = 20430592 and 20430601.

It is not an unprimeable number, because it can be changed into a prime (20430607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2573 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (2725632).

Almost surely, 2^20430617 is an apocalyptic number.

It is an amenable number.

20430617 is a deficient number, since it is larger than the sum of its proper divisors (1374439).

20430617 is a wasteful number, since it uses less digits than its factorization.

20430617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20430617 is about 4520.0240043610. The cubic root of 20430617 is about 273.3760689013.

The spelling of 20430617 in words is "twenty million, four hundred thirty thousand, six hundred seventeen".