20447574634 has 8 divisors (see below), whose sum is σ = 30975039108. Its totient is φ = 10122561600.

The previous prime is 20447574593. The next prime is 20447574647. The reversal of 20447574634 is 43647574402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15857105625 + 4590469009 = 125925^2 + 67753^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50612607 + ... + 50613010.

Almost surely, 2^20447574634 is an apocalyptic number.

20447574634 is a deficient number, since it is larger than the sum of its proper divisors (10527464474).

20447574634 is a wasteful number, since it uses less digits than its factorization.

20447574634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101225720.

The product of its (nonzero) digits is 2257920, while the sum is 46.

The spelling of 20447574634 in words is "twenty billion, four hundred forty-seven million, five hundred seventy-four thousand, six hundred thirty-four".