20774741844 has 24 divisors (see below), whose sum is σ = 48653277568. Its totient is φ = 6899359680.

The previous prime is 20774741839. The next prime is 20774741851. The reversal of 20774741844 is 44814747702.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20774741793 and 20774741802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3190897 + ... + 3197400.

Almost surely, 2^20774741844 is an apocalyptic number.

It is an amenable number.

20774741844 is an abundant number, since it is smaller than the sum of its proper divisors (27878535724).

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

20774741844 is a wasteful number, since it uses less digits than its factorization.

20774741844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388575 (or 6388573 counting only the distinct ones).

The product of its (nonzero) digits is 1404928, while the sum is 48.

The spelling of 20774741844 in words is "twenty billion, seven hundred seventy-four million, seven hundred forty-one thousand, eight hundred forty-four".