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16306605021 = 372347718321
BaseRepresentation
bin11110010111111001…
…10000101111011101
31120002102202100211010
433023330300233131
5231343442330041
611254031045433
71115043566340
oct171374605735
946072670733
1016306605021
116a08720783
1231b1070879
1316cb457515
14b09984457
156568aba16
hex3cbf30bdd

16306605021 has 32 divisors (see below), whose sum is σ = 26480222208. Its totient is φ = 8723278080.

The previous prime is 16306605019. The next prime is 16306605041. The reversal of 16306605021 is 12050660361.

It is not a de Polignac number, because 16306605021 - 21 = 16306605019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16306605021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16306605041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336460 + ... + 381861.

It is an arithmetic number, because the mean of its divisors is an integer number (827506944).

Almost surely, 216306605021 is an apocalyptic number.

It is an amenable number.

16306605021 is a deficient number, since it is larger than the sum of its proper divisors (10173617187).

16306605021 is a wasteful number, since it uses less digits than its factorization.

16306605021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718401.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 16306605021 in words is "sixteen billion, three hundred six million, six hundred five thousand, twenty-one".

Divisors: 1 3 7 21 23 47 69 141 161 329 483 987 1081 3243 7567 22701 718321 2154963 5028247 15084741 16521383 33761087 49564149 101283261 115649681 236327609 346949043 708982827 776505001 2329515003 5435535007 16306605021