20447474858 has 8 divisors (see below), whose sum is σ = 32004743328. Its totient is φ = 9779227084.

The previous prime is 20447474857. The next prime is 20447474903. The reversal of 20447474858 is 85847474402.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20447474851) 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, 222255116 + ... + 222255207.

It is an arithmetic number, because the mean of its divisors is an integer number (4000592916).

Almost surely, 2^20447474858 is an apocalyptic number.

20447474858 is a deficient number, since it is larger than the sum of its proper divisors (11557268470).

20447474858 is a wasteful number, since it uses less digits than its factorization.

20447474858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444510348.

The product of its (nonzero) digits is 8028160, while the sum is 53.

The spelling of 20447474858 in words is "twenty billion, four hundred forty-seven million, four hundred seventy-four thousand, eight hundred fifty-eight".