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18030879401 = 31678681213
BaseRepresentation
bin10000110010101110…
…010110001010101001
31201112121021120121012
4100302232112022221
5243411401120101
612141104153305
71205551642343
oct206256261251
951477246535
1018030879401
117712a63627
1235b2608835
131914752912
14c30988293
15707e57bbb
hex432b962a9

18030879401 has 8 divisors (see below), whose sum is σ = 18890321664. Its totient is φ = 17188799760.

The previous prime is 18030879367. The next prime is 18030879409. The reversal of 18030879401 is 10497803081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18030879401 - 210 = 18030878377 is a prime.

It is a super-2 number, since 2×180308794012 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18030879409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4338530 + ... + 4342683.

It is an arithmetic number, because the mean of its divisors is an integer number (2361290208).

Almost surely, 218030879401 is an apocalyptic number.

It is an amenable number.

18030879401 is a deficient number, since it is larger than the sum of its proper divisors (859442263).

18030879401 is an equidigital number, since it uses as much as digits as its factorization.

18030879401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681311.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 18030879401 in words is "eighteen billion, thirty million, eight hundred seventy-nine thousand, four hundred one".

Divisors: 1 31 67 2077 8681213 269117603 581641271 18030879401