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21358608628466 = 273149981824429
BaseRepresentation
bin1001101101100111100000…
…10001111011101011110010
32210121212022011021202201002
410312303300101323223302
510244414412302102331
6113232002004042002
74333052142563234
oct466636021735362
983555264252632
1021358608628466
11689515383125a
12248b536993302
13bbc1537bb095
1453ba95592254
152708be2c09cb
hex136cf047baf2

21358608628466 has 16 divisors (see below), whose sum is σ = 32694753519000. Its totient is φ = 10462321104768.

The previous prime is 21358608628453. The next prime is 21358608628471. The reversal of 21358608628466 is 66482680685312.

It can be written as a sum of positive squares in 4 ways, for example, as 6872812776025 + 14485795852441 = 2621605^2 + 3806021^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490890461 + ... + 490933968.

Almost surely, 221358608628466 is an apocalyptic number.

21358608628466 is a deficient number, since it is larger than the sum of its proper divisors (11336144890534).

21358608628466 is a wasteful number, since it uses less digits than its factorization.

21358608628466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981824653.

The product of its (nonzero) digits is 159252480, while the sum is 65.

The spelling of 21358608628466 in words is "twenty-one trillion, three hundred fifty-eight billion, six hundred eight million, six hundred twenty-eight thousand, four hundred sixty-six".

Divisors: 1 2 73 146 149 298 10877 21754 981824429 1963648858 71673183317 143346366634 146291839921 292583679842 10679304314233 21358608628466