20568493 has 8 divisors (see below), whose sum is σ = 22499136. Its totient is φ = 18648000.

The previous prime is 20568461. The next prime is 20568497. The reversal of 20568493 is 39486502.

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 20568493 - 2⁵ = 20568461 is a prime.

It is a super-3 number, since 3×20568493³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20568497) 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, 2080 + ... + 6742.

It is an arithmetic number, because the mean of its divisors is an integer number (2812392).

Almost surely, 2^20568493 is an apocalyptic number.

It is an amenable number.

20568493 is a deficient number, since it is larger than the sum of its proper divisors (1930643).

20568493 is a wasteful number, since it uses less digits than its factorization.

20568493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5075.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20568493 is about 4535.2500482333. The cubic root of 20568493 is about 273.9896500966.

The spelling of 20568493 in words is "twenty million, five hundred sixty-eight thousand, four hundred ninety-three".