20859416478 has 24 divisors (see below), whose sum is σ = 45595366128. Its totient is φ = 6891605952.

The previous prime is 20859416471. The next prime is 20859416489. The reversal of 20859416478 is 87461495802.

It is a happy number.

20859416478 is a `hidden beast` number, since 2 + 0 + 8 + 594 + 1 + 6 + 47 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859416471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5125650 + ... + 5129717.

It is an arithmetic number, because the mean of its divisors is an integer number (1899806922).

Almost surely, 2^20859416478 is an apocalyptic number.

20859416478 is an abundant number, since it is smaller than the sum of its proper divisors (24735949650).

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

20859416478 is a wasteful number, since it uses less digits than its factorization.

20859416478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10255488 (or 10255485 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 20859416478 in words is "twenty billion, eight hundred fifty-nine million, four hundred sixteen thousand, four hundred seventy-eight".