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18970396024 = 2319592115343
BaseRepresentation
bin10001101010101110…
…010100010101111000
31210222002010222010011
4101222232110111320
5302322410133044
612414225231304
71241050464016
oct215256242570
953862128104
1018970396024
118055326348
123815192534
131a342a3b08
14cbd66d8b6
1576068d134
hex46ab94578

18970396024 has 32 divisors (see below), whose sum is σ = 38076192000. Its totient is φ = 8833668192.

The previous prime is 18970395979. The next prime is 18970396051. The reversal of 18970396024 is 42069307981.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048704 + ... + 1066639.

It is an arithmetic number, because the mean of its divisors is an integer number (1189881000).

Almost surely, 218970396024 is an apocalyptic number.

It is an amenable number.

18970396024 is an abundant number, since it is smaller than the sum of its proper divisors (19105795976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18970396024 is a wasteful number, since it uses less digits than its factorization.

18970396024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115427 (or 2115423 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 18970396024 in words is "eighteen billion, nine hundred seventy million, three hundred ninety-six thousand, twenty-four".

Divisors: 1 2 4 8 19 38 59 76 118 152 236 472 1121 2242 4484 8968 2115343 4230686 8461372 16922744 40191517 80383034 124805237 160766068 249610474 321532136 499220948 998441896 2371299503 4742599006 9485198012 18970396024