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19149983028 = 2232113161107239
BaseRepresentation
bin10001110101011011…
…011000110100110100
31211102121001221011200
4101311123120310310
5303204343424103
612444122332500
71245361112211
oct216533306464
954377057150
1019149983028
118137736760
12386535a130
131a62561a07
14cd945ab08
157713140a3
hex4756d8d34

19149983028 has 288 divisors, whose sum is σ = 56156405760. Its totient is φ = 5449248000.

The previous prime is 19149982961. The next prime is 19149983063. The reversal of 19149983028 is 82038994191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80125333 + ... + 80125571.

It is an arithmetic number, because the mean of its divisors is an integer number (194987520).

Almost surely, 219149983028 is an apocalyptic number.

19149983028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19149983028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28078202880).

19149983028 is an abundant number, since it is smaller than the sum of its proper divisors (37006422732).

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

19149983028 is a wasteful number, since it uses less digits than its factorization.

19149983028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 19149983028 in words is "nineteen billion, one hundred forty-nine million, nine hundred eighty-three thousand, twenty-eight".