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22639394493 = 3222691108633
BaseRepresentation
bin10101000101011010…
…011011111010111101
32011102210000101211100
4111011122123322331
5332331141110433
614222252443313
71431011451402
oct250532337275
964383011740
1022639394493
119668391191
124479a79539
13219a461921
14114aa602a9
158c782db13
hex54569bebd

22639394493 has 12 divisors (see below), whose sum is σ = 32715789340. Its totient is φ = 15086264256.

The previous prime is 22639394489. The next prime is 22639394497. The reversal of 22639394493 is 39449393622.

22639394493 is a `hidden beast` number, since 2 + 2 + 63 + 9 + 3 + 94 + 493 = 666.

It is an interprime number because it is at equal distance from previous prime (22639394489) and next prime (22639394497).

It can be written as a sum of positive squares in 2 ways, for example, as 3557287449 + 19082107044 = 59643^2 + 138138^2 .

It is not a de Polignac number, because 22639394493 - 22 = 22639394489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22639394497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533896 + ... + 574737.

Almost surely, 222639394493 is an apocalyptic number.

It is an amenable number.

22639394493 is a deficient number, since it is larger than the sum of its proper divisors (10076394847).

22639394493 is a wasteful number, since it uses less digits than its factorization.

22639394493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110908 (or 1110905 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 54.

The spelling of 22639394493 in words is "twenty-two billion, six hundred thirty-nine million, three hundred ninety-four thousand, four hundred ninety-three".

Divisors: 1 3 9 2269 6807 20421 1108633 3325899 9977697 2515488277 7546464831 22639394493