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21244236530 = 2511223986257
BaseRepresentation
bin10011110010010000…
…010101001011110010
32000211112210000220012
4103302100111023302
5322002011032110
613432013414522
71351311013436
oct236220251362
960745700805
1021244236530
1190118aa380
12414a79a442
1320073ba07a
14105764c9c6
158450e3905
hex4f24152f2

21244236530 has 32 divisors (see below), whose sum is σ = 41735070720. Its totient is φ = 7721637120.

The previous prime is 21244236527. The next prime is 21244236539. The reversal of 21244236530 is 3563244212.

It is a super-3 number, since 3×212442365303 (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21244236539) 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, 203162 + ... + 289418.

It is an arithmetic number, because the mean of its divisors is an integer number (1304220960).

Almost surely, 221244236530 is an apocalyptic number.

21244236530 is a deficient number, since it is larger than the sum of its proper divisors (20490834190).

21244236530 is a wasteful number, since it uses less digits than its factorization.

21244236530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88514.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 21244236530 in words is "twenty-one billion, two hundred forty-four million, two hundred thirty-six thousand, five hundred thirty".

Divisors: 1 2 5 10 11 22 55 110 2239 4478 11195 22390 24629 49258 86257 123145 172514 246290 431285 862570 948827 1897654 4744135 9488270 193129423 386258846 965647115 1931294230 2124423653 4248847306 10622118265 21244236530