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1930204031 = 7310155717
BaseRepresentation
bin111001100001100…
…1001001101111111
311222112000112011012
41303003021031333
512423113012111
6515310545435
765555315000
oct16303111577
94875015135
101930204031
11900605948
1245a50827b
13249b7a682
141444cb1a7
15b46c748b
hex730c937f

1930204031 has 16 divisors (see below), whose sum is σ = 2273294400. Its totient is φ = 1638050400.

The previous prime is 1930204009. The next prime is 1930204033. The reversal of 1930204031 is 1304020391.

It is not a de Polignac number, because 1930204031 - 26 = 1930203967 is a prime.

It is a super-2 number, since 2×19302040312 = 7451375202577297922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1930203988 and 1930204006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930204033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6785 + ... + 62501.

It is an arithmetic number, because the mean of its divisors is an integer number (142080900).

Almost surely, 21930204031 is an apocalyptic number.

1930204031 is a deficient number, since it is larger than the sum of its proper divisors (343090369).

1930204031 is an equidigital number, since it uses as much as digits as its factorization.

1930204031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55839 (or 55825 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1930204031 is about 43934.0873468427. The cubic root of 1930204031 is about 1245.0909394173.

The spelling of 1930204031 in words is "one billion, nine hundred thirty million, two hundred four thousand, thirty-one".

Divisors: 1 7 49 101 343 707 4949 34643 55717 390019 2730133 5627417 19110931 39391919 275743433 1930204031