20844658544 has 10 divisors (see below), whose sum is σ = 40386525960. Its totient is φ = 10422329264.

The previous prime is 20844658507. The next prime is 20844658547. The reversal of 20844658544 is 44585644802.

It is a junction number, because it is equal to n+sod(n) for n = 20844658492 and 20844658501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20844658547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651395564 + ... + 651395595.

It is an arithmetic number, because the mean of its divisors is an integer number (4038652596).

Almost surely, 2^20844658544 is an apocalyptic number.

It is an amenable number.

20844658544 is a deficient number, since it is larger than the sum of its proper divisors (19541867416).

20844658544 is a wasteful number, since it uses less digits than its factorization.

20844658544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302791167 (or 1302791161 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 50.

The spelling of 20844658544 in words is "twenty billion, eight hundred forty-four million, six hundred fifty-eight thousand, five hundred forty-four".