20603479 has 8 divisors (see below), whose sum is σ = 22418480. Its totient is φ = 18821376.

The previous prime is 20603477. The next prime is 20603483. The reversal of 20603479 is 97430602.

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 20603479 - 2¹ = 20603477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20603479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603477) 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, 6909 + ... + 9430.

It is an arithmetic number, because the mean of its divisors is an integer number (2802310).

Almost surely, 2^20603479 is an apocalyptic number.

20603479 is a deficient number, since it is larger than the sum of its proper divisors (1815001).

20603479 is a wasteful number, since it uses less digits than its factorization.

20603479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16449.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20603479 is about 4539.1055286257. The cubic root of 20603479 is about 274.1449097622.

The spelling of 20603479 in words is "twenty million, six hundred three thousand, four hundred seventy-nine".