20641627544 has 8 divisors (see below), whose sum is σ = 38703051660. Its totient is φ = 10320813768.

The previous prime is 20641627529. The next prime is 20641627561. The reversal of 20641627544 is 44572614602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290101714 + ... + 1290101729.

Almost surely, 2^20641627544 is an apocalyptic number.

It is an amenable number.

20641627544 is a deficient number, since it is larger than the sum of its proper divisors (18061424116).

20641627544 is a wasteful number, since it uses less digits than its factorization.

20641627544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580203449 (or 2580203445 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 20641627544 in words is "twenty billion, six hundred forty-one million, six hundred twenty-seven thousand, five hundred forty-four".