Search a number
-
+
20979244044 = 22321152977889
BaseRepresentation
bin10011100010011101…
…011101110000001100
32000011002011000112200
4103202131131300030
5320431141302134
613345430001500
71341612426543
oct234235356014
960132130480
1020979244044
118996266620
124095aa6290
131c94528595
14103038d15a
1582bbec499
hex4e275dc0c

20979244044 has 36 divisors (see below), whose sum is σ = 57851855880. Its totient is φ = 6357346560.

The previous prime is 20979244021. The next prime is 20979244049. The reversal of 20979244044 is 44044297902.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20979244049) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 26488549 + ... + 26489340.

Almost surely, 220979244044 is an apocalyptic number.

It is an amenable number.

20979244044 is an abundant number, since it is smaller than the sum of its proper divisors (36872611836).

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

20979244044 is a wasteful number, since it uses less digits than its factorization.

20979244044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52977910 (or 52977905 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20979244044 in words is "twenty billion, nine hundred seventy-nine million, two hundred forty-four thousand, forty-four".

Divisors: 1 2 3 4 6 9 11 12 18 22 33 36 44 66 99 132 198 396 52977889 105955778 158933667 211911556 317867334 476801001 582756779 635734668 953602002 1165513558 1748270337 1907204004 2331027116 3496540674 5244811011 6993081348 10489622022 20979244044