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BaseRepresentation
bin10011110101110101…
…111111011001111010
32000222202001201010201
4103311311333121322
5322112414043232
613442004032414
71352641520155
oct236565773172
960882051121
1021304440442
11904288a47a
12416699270a
132016a08a9c
141061640c9c
1584a536be7
hex4f5d7f67a

21304440442 has 8 divisors (see below), whose sum is σ = 32480540532. Its totient is φ = 10477593600.

The previous prime is 21304440397. The next prime is 21304440473. The reversal of 21304440442 is 24404440312.

Adding to 21304440442 its reverse (24404440312), we get a palindrome (45708880754).

It can be written as a sum of positive squares in 2 ways, for example, as 14040117081 + 7264323361 = 118491^2 + 85231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21304440442.

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, 87313159 + ... + 87313402.

Almost surely, 221304440442 is an apocalyptic number.

21304440442 is a deficient number, since it is larger than the sum of its proper divisors (11176100090).

21304440442 is a wasteful number, since it uses less digits than its factorization.

21304440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174626624.

The product of its (nonzero) digits is 12288, while the sum is 28.

The spelling of 21304440442 in words is "twenty-one billion, three hundred four million, four hundred forty thousand, four hundred forty-two".