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21313144312 = 232839413933
BaseRepresentation
bin10011110110010111…
…001100010111111000
32001000100102220121021
4103312113030113320
5322122131104222
613442514352224
71353105510655
oct236627142770
961010386537
1021313144312
119047794859
12416988b674
1320187656c5
141062868c2c
1584b1a5ac7
hex4f65cc5f8

21313144312 has 16 divisors (see below), whose sum is σ = 40103358840. Its totient is φ = 10618915296.

The previous prime is 21313144309. The next prime is 21313144337. The reversal of 21313144312 is 21344131312.

It is a congruent number.

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, 4704703 + ... + 4709230.

Almost surely, 221313144312 is an apocalyptic number.

It is an amenable number.

21313144312 is a deficient number, since it is larger than the sum of its proper divisors (18790214528).

21313144312 is a wasteful number, since it uses less digits than its factorization.

21313144312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414222 (or 9414218 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 21313144312 its reverse (21344131312), we get a palindrome (42657275624).

The spelling of 21313144312 in words is "twenty-one billion, three hundred thirteen million, one hundred forty-four thousand, three hundred twelve".

Divisors: 1 2 4 8 283 566 1132 2264 9413933 18827866 37655732 75311464 2664143039 5328286078 10656572156 21313144312