20641546908 has 18 divisors (see below), whose sum is σ = 52177243664. Its totient is φ = 6880515624.

The previous prime is 20641546901. The next prime is 20641546921. The reversal of 20641546908 is 80964514602.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641546901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286688116 + ... + 286688187.

Almost surely, 2^20641546908 is an apocalyptic number.

It is an amenable number.

20641546908 is an abundant number, since it is smaller than the sum of its proper divisors (31535696756).

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

20641546908 is a wasteful number, since it uses less digits than its factorization.

20641546908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573376313 (or 573376308 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20641546908 in words is "twenty billion, six hundred forty-one million, five hundred forty-six thousand, nine hundred eight".