Base | Representation |
---|---|
bin | 10011111101000100… |
… | …010011101010110100 |
3 | 2001022012002222101222 |
4 | 103331010103222310 |
5 | 322334430241342 |
6 | 13502013405512 |
7 | 1355642612111 |
oct | 237504235264 |
9 | 61265088358 |
10 | 21425633972 |
11 | 90a5236a16 |
12 | 419b499898 |
13 | 2035b60032 |
14 | 107378b908 |
15 | 855ec5ed2 |
hex | 4fd113ab4 |
21425633972 has 12 divisors (see below), whose sum is σ = 37608139296. Its totient is φ = 10680451320.
The previous prime is 21425633959. The next prime is 21425633989. The reversal of 21425633972 is 27933652412.
It is a super-5 number, since 5×214256339725 (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.
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, 8089928 + ... + 8092575.
It is an arithmetic number, because the mean of its divisors is an integer number (3134011608).
Almost surely, 221425633972 is an apocalyptic number.
It is an amenable number.
21425633972 is a deficient number, since it is larger than the sum of its proper divisors (16182505324).
21425633972 is a wasteful number, since it uses less digits than its factorization.
21425633972 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 16182838 (or 16182836 counting only the distinct ones).
The product of its digits is 544320, while the sum is 44.
The spelling of 21425633972 in words is "twenty-one billion, four hundred twenty-five million, six hundred thirty-three thousand, nine hundred seventy-two".
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