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30311111996 = 221117192132783
BaseRepresentation
bin11100001110101011…
…101101110100111100
32220020102201000210122
4130032223231310330
5444034121040441
621531424154112
72122065125624
oct341653556474
986212630718
1030311111996
1111944918090
125a5b168938
132b20983939
1416778b1884
15bc60d034b
hex70eaedd3c

30311111996 has 48 divisors (see below), whose sum is σ = 64495388160. Its totient is φ = 12284824320.

The previous prime is 30311111879. The next prime is 30311112031. The reversal of 30311111996 is 69911111303.

It is a congruent number.

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, 1052180 + ... + 1080603.

It is an arithmetic number, because the mean of its divisors is an integer number (1343653920).

Almost surely, 230311111996 is an apocalyptic number.

It is an amenable number.

30311111996 is an abundant number, since it is smaller than the sum of its proper divisors (34184276164).

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

30311111996 is a wasteful number, since it uses less digits than its factorization.

30311111996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132834 (or 2132832 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 30311111996 in words is "thirty billion, three hundred eleven million, one hundred eleven thousand, nine hundred ninety-six".

Divisors: 1 2 4 11 17 19 22 34 38 44 68 76 187 209 323 374 418 646 748 836 1292 3553 7106 14212 2132783 4265566 8531132 23460613 36257311 40522877 46921226 72514622 81045754 93842452 145029244 162091508 398830421 445751647 688888909 797660842 891503294 1377777818 1595321684 1783006588 2755555636 7577777999 15155555998 30311111996