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18049198541 = 113167790003
BaseRepresentation
bin10000110011110100…
…001110100111001101
31201120212202021201212
4100303310032213031
5243431043323131
612143000544205
71206163441043
oct206364164715
951525667655
1018049198541
117722336010
1235b8782065
131918497c4a
14c33196393
15709875a2b
hex433d0e9cd

18049198541 has 16 divisors (see below), whose sum is σ = 20628584448. Its totient is φ = 15642039600.

The previous prime is 18049198499. The next prime is 18049198591. The reversal of 18049198541 is 14589194081.

It is not a de Polignac number, because 18049198541 - 214 = 18049182157 is a prime.

It is a super-3 number, since 3×180491985413 (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18049198541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049198591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372155 + ... + 417848.

It is an arithmetic number, because the mean of its divisors is an integer number (1289286528).

Almost surely, 218049198541 is an apocalyptic number.

18049198541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18049198541 is a deficient number, since it is larger than the sum of its proper divisors (2579385907).

18049198541 is a wasteful number, since it uses less digits than its factorization.

18049198541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790112.

The product of its (nonzero) digits is 414720, while the sum is 50.

The spelling of 18049198541 in words is "eighteen billion, forty-nine million, one hundred ninety-eight thousand, five hundred forty-one".

Divisors: 1 11 31 67 341 737 2077 22847 790003 8690033 24490093 52930201 269391023 582232211 1640836231 18049198541