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19983000955 = 539756317881
BaseRepresentation
bin10010100111000101…
…000110010101111011
31220120122112121221111
4102213011012111323
5311411122012310
613102521021151
71305124464001
oct224705062573
956518477844
1019983000955
118524979425
123a583247b7
131b66005428
14d77d3ca71
157be50e28a
hex4a714657b

19983000955 has 16 divisors (see below), whose sum is σ = 24084049824. Its totient is φ = 15916919040.

The previous prime is 19983000949. The next prime is 19983000997. The reversal of 19983000955 is 55900038991.

It is a happy number.

It is not a de Polignac number, because 19983000955 - 211 = 19982998907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19983000899 and 19983000908.

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, 1108615 + ... + 1126495.

It is an arithmetic number, because the mean of its divisors is an integer number (1505253114).

Almost surely, 219983000955 is an apocalyptic number.

19983000955 is the 89405-th heptagonal number.

19983000955 is a deficient number, since it is larger than the sum of its proper divisors (4101048869).

19983000955 is a wasteful number, since it uses less digits than its factorization.

19983000955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846.

The product of its (nonzero) digits is 437400, while the sum is 49.

The spelling of 19983000955 in words is "nineteen billion, nine hundred eighty-three million, nine hundred fifty-five", and thus it is an aban number.

Divisors: 1 5 397 563 1985 2815 17881 89405 223511 1117555 7098757 10067003 35493785 50335015 3996600191 19983000955