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20301102808 = 2371991821707
BaseRepresentation
bin10010111010000010…
…100011111011011000
31221101211002212122121
4102322002203323120
5313034040242213
613154243031024
71316036345440
oct227202437330
957354085577
1020301102808
118678497018
123b2696b474
131bb6ba068c
14da82a5120
157dc3e688d
hex4ba0a3ed8

20301102808 has 32 divisors (see below), whose sum is σ = 43720992000. Its totient is φ = 8656746912.

The previous prime is 20301102803. The next prime is 20301102821. The reversal of 20301102808 is 80820110302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20301102803) by changing a digit.

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, 899710 + ... + 921997.

It is an arithmetic number, because the mean of its divisors is an integer number (1366281000).

Almost surely, 220301102808 is an apocalyptic number.

20301102808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20301102808 is an abundant number, since it is smaller than the sum of its proper divisors (23419889192).

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

20301102808 is a wasteful number, since it uses less digits than its factorization.

20301102808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821919 (or 1821915 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 20301102808 in words is "twenty billion, three hundred one million, one hundred two thousand, eight hundred eight".

Divisors: 1 2 4 7 8 14 28 56 199 398 796 1393 1592 2786 5572 11144 1821707 3643414 7286828 12751949 14573656 25503898 51007796 102015592 362519693 725039386 1450078772 2537637851 2900157544 5075275702 10150551404 20301102808