20859474 has 8 divisors (see below), whose sum is σ = 41718960. Its totient is φ = 6953156.

The previous prime is 20859463. The next prime is 20859479. The reversal of 20859474 is 47495802.

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

20859474 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20859479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738284 + ... + 1738295.

It is an arithmetic number, because the mean of its divisors is an integer number (5214870).

Almost surely, 2^20859474 is an apocalyptic number.

20859474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20859474 is a wasteful number, since it uses less digits than its factorization.

20859474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476584.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20859474 is about 4567.2173147333. The cubic root of 20859474 is about 275.2756420793.

The spelling of 20859474 in words is "twenty million, eight hundred fifty-nine thousand, four hundred seventy-four".