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30021438715 = 571389217397
BaseRepresentation
bin11011111101011010…
…101100110011111011
32212111020122002202121
4123331122230303323
5442440442014330
621442555342111
72111650006252
oct337532546373
985436562677
1030021438715
1111806357284
12599a151937
132aa5960328
14164b229799
15baa96117a
hex6fd6accfb

30021438715 has 16 divisors (see below), whose sum is σ = 36627215040. Its totient is φ = 23617901440.

The previous prime is 30021438697. The next prime is 30021438749. The reversal of 30021438715 is 51783412003.

It is not a de Polignac number, because 30021438715 - 229 = 29484567803 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29397 + ... + 246793.

It is an arithmetic number, because the mean of its divisors is an integer number (2289200940).

Almost surely, 230021438715 is an apocalyptic number.

30021438715 is a deficient number, since it is larger than the sum of its proper divisors (6605776325).

30021438715 is a wasteful number, since it uses less digits than its factorization.

30021438715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217862.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 30021438715 in words is "thirty billion, twenty-one million, four hundred thirty-eight thousand, seven hundred fifteen".

Divisors: 1 5 71 355 389 1945 27619 138095 217397 1086985 15435187 77175935 84567433 422837165 6004287743 30021438715