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21001283399 = 471014424117
BaseRepresentation
bin10011100011110001…
…100010011101000111
32000012121121201212002
4103203301202131013
5321002312032044
613351534215515
71342300651325
oct234361423507
960177551762
1021001283399
1189a774a068
1240a135459b
131c98c74015
141033288d15
1582db0274e
hex4e3c62747

21001283399 has 8 divisors (see below), whose sum is σ = 21660481728. Its totient is φ = 20350933600.

The previous prime is 21001283393. The next prime is 21001283419. The reversal of 21001283399 is 99338210012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001283399 - 212 = 21001279303 is a prime.

It is a super-2 number, since 2×210012833992 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001283393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207312 + ... + 2216805.

It is an arithmetic number, because the mean of its divisors is an integer number (2707560216).

Almost surely, 221001283399 is an apocalyptic number.

21001283399 is a deficient number, since it is larger than the sum of its proper divisors (659198329).

21001283399 is a wasteful number, since it uses less digits than its factorization.

21001283399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424265.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 21001283399 in words is "twenty-one billion, one million, two hundred eighty-three thousand, three hundred ninety-nine".

Divisors: 1 47 101 4747 4424117 207933499 446835817 21001283399