20444570636 has 24 divisors (see below), whose sum is σ = 40910424576. Its totient is φ = 8757398160.

The previous prime is 20444570609. The next prime is 20444570669. The reversal of 20444570636 is 63607544402.

It is a junction number, because it is equal to n+sod(n) for n = 20444570593 and 20444570602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134996 + ... + 243131.

It is an arithmetic number, because the mean of its divisors is an integer number (1704601024).

Almost surely, 2^20444570636 is an apocalyptic number.

It is an amenable number.

20444570636 is an abundant number, since it is smaller than the sum of its proper divisors (20465853940).

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

20444570636 is a wasteful number, since it uses less digits than its factorization.

20444570636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380069 (or 380067 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 41.

The spelling of 20444570636 in words is "twenty billion, four hundred forty-four million, five hundred seventy thousand, six hundred thirty-six".