20206776544 has 24 divisors (see below), whose sum is σ = 39841245360. Its totient is φ = 10088365056.

The previous prime is 20206776517. The next prime is 20206776559. The reversal of 20206776544 is 44567760202.

It is a self number, because there is not a number n which added to its sum of digits gives 20206776544.

It is a congruent number.

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, 447604 + ... + 490675.

It is an arithmetic number, because the mean of its divisors is an integer number (1660051890).

Almost surely, 2^20206776544 is an apocalyptic number.

It is an amenable number.

20206776544 is a deficient number, since it is larger than the sum of its proper divisors (19634468816).

20206776544 is an equidigital number, since it uses as much as digits as its factorization.

20206776544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938962 (or 938954 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 20206776544 in words is "twenty billion, two hundred six million, seven hundred seventy-six thousand, five hundred forty-four".