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20442234021 = 3115471132471
BaseRepresentation
bin10011000010011100…
…111011110010100101
31221202122200002021120
4103002130323302211
5313331202442041
613220244004153
71322402056626
oct230234736245
957678602246
1020442234021
118740120a90
123b66090659
131c0a1b5881
14dbcd21a4d
157e99c3366
hex4c273bca5

20442234021 has 16 divisors (see below), whose sum is σ = 29788543488. Its totient is φ = 12366572400.

The previous prime is 20442234017. The next prime is 20442234031. The reversal of 20442234021 is 12043224402.

It is not a de Polignac number, because 20442234021 - 22 = 20442234017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20442233982 and 20442234000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442234011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548185 + ... + 584286.

It is an arithmetic number, because the mean of its divisors is an integer number (1861783968).

Almost surely, 220442234021 is an apocalyptic number.

It is an amenable number.

20442234021 is a deficient number, since it is larger than the sum of its proper divisors (9346309467).

20442234021 is a wasteful number, since it uses less digits than its factorization.

20442234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133032.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20442234021 its reverse (12043224402), we get a palindrome (32485458423).

The spelling of 20442234021 in words is "twenty billion, four hundred forty-two million, two hundred thirty-four thousand, twenty-one".

Divisors: 1 3 11 33 547 1641 6017 18051 1132471 3397413 12457181 37371543 619461637 1858384911 6814078007 20442234021